---
title: "16 Theory Quotes By Claude Bernard"
description: "16 Theory quotes by Claude Bernard. Plus more from Claude Bernard and more Theory sayings from other authors."
image: "https://sms4smile.com/quotes/i/83d/claude-bernard-7455_funny_we-must-alter-theory-to-adapt-it-to-natu_3034079.png"
---

> [We must alter theory to adapt it to nature, but not nature to adapt it to theory.](https://sms4smile.com/quotes/claude-bernard/we-must-alter-theory-to-adapt-it-to-nature-but-not-nature-to-adapt-it/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/83d/claude-bernard-7455_funny_we-must-alter-theory-to-adapt-it-to-natu_3034079.png)

> [We must keep our freedom of mind, ... and must believe that in nature what is absurd, according to our theories, is…](https://sms4smile.com/quotes/claude-bernard/we-must-keep-our-freedom-of-mind-and-must-believe-that-in-nature-what/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/48b/claude-bernard-7455_absurd_we-must-keep-our-freedom-of-mind-and-mus_462409.png)

> [A discovery is generally an unforeseen relation not included in theory.](https://sms4smile.com/quotes/claude-bernard/a-discovery-is-generally-an-unforeseen-relation-not-included-in-theory/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/dde/claude-bernard-7455_discovery_a-discovery-is-generally-an-unforeseen-r_1336421.png)

> [But while I accept specialization in the practice, I reject it utterly in the theory of science.](https://sms4smile.com/quotes/claude-bernard/but-while-i-accept-specialization-in-the-practice-i-reject-it-utterly/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/62a/claude-bernard-7455_accepting_but-while-i-accept-specialization-in-the_329047.png)

> [Men who believe too firmly in their theories, do not believe enough in the theories of others. So ... these despisers of…](https://sms4smile.com/quotes/claude-bernard/men-who-believe-too-firmly-in-their-theories-do-not-believe-enough-in/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/72f/claude-bernard-7455_believe_men-who-believe-too-firmly-in-their-theo_771336.jpg)

> [Well-observed facts, though brought to light by passing theories, will never die; they are the material on which alone the house of…](https://sms4smile.com/quotes/claude-bernard/well-observed-facts-though-brought-to-light-by-passing-theories-will/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/33c/claude-bernard-7455_accounts_well-observed-facts-though-brought-to-li_2194821.png)

> [When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory, even when the…](https://sms4smile.com/quotes/claude-bernard/when-we-meet-a-fact-which-contradicts-a-prevailing-theory-we-must/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/272/claude-bernard-7455_abandon_when-we-meet-a-fact-which-contradicts-a_439799.jpg)

> [ \[Those\] who have an excessive faith in their theories or in their ideas are not only poorly disposed to make discoveries, but… ](https://sms4smile.com/quotes/claude-bernard/those-who-have-an-excessive-faith-in-their-theories-or-in-their-ideas/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/0fe/claude-bernard-7455_discovery_those-who-have-an-excessive-faith-in-the_508168.png)

> [Theories are like a stairway; by climbing, science widens its horizon more and more, because theories embody and necessarily include proportionately more…](https://sms4smile.com/quotes/claude-bernard/theories-are-like-a-stairway-by-climbing-science-widens-its-horizon/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/022/claude-bernard-7455_accounts_theories-are-like-a-stairway-by-climbing_2271463.png)

> [In these researches I followed the principles of the experimental method that we have established, i.e., that, in presence of a well-noted,…](https://sms4smile.com/quotes/claude-bernard/in-these-researches-i-followed-the-principles-of-the-experimental/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/b26/claude-bernard-7455_facts_in-these-researches-i-followed-the-princ_2930453.jpg)

> [Men who have excessive faith in their theories or ideas are not only ill prepared for making discoveries; they also make very…](https://sms4smile.com/quotes/claude-bernard/men-who-have-excessive-faith-in-their-theories-or-ideas-are-not-only/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/405/claude-bernard-7455_aim_men-who-have-excessive-faith-in-their-th_808088.png)

> [Progress is achieved by exchanging our theories for new ones which go further than the old, until we find one based on…](https://sms4smile.com/quotes/claude-bernard/progress-is-achieved-by-exchanging-our-theories-for-new-ones-which-go/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/282/claude-bernard-7455_exchanging_progress-is-achieved-by-exchanging-our-t_402826.jpg)

> [Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists…](https://sms4smile.com/quotes/claude-bernard/even-mistaken-hypotheses-and-theories-are-of-use-in-leading-to-2/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/3ca/claude-bernard-7455_able_even-mistaken-hypotheses-and-theories-ar_528084.png)

> [Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists…](https://sms4smile.com/quotes/claude-bernard/even-mistaken-hypotheses-and-theories-are-of-use-in-leading-to/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/85f/claude-bernard-7455_able_even-mistaken-hypotheses-and-theories-ar_108694.png)

> [Men who have excessive faith in their theories ... make poor observations, because they choose among the results of their experiments only…](https://sms4smile.com/quotes/claude-bernard/men-who-have-excessive-faith-in-their-theories-make-poor-observations/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/280/claude-bernard-7455_combat_men-who-have-excessive-faith-in-their-th_372737.png)

> [It has often been said that, to make discoveries, one must be ignorant. This opinion, mistaken in itself, nevertheless conceals a truth.…](https://sms4smile.com/quotes/claude-bernard/it-has-often-been-said-that-to-make-discoveries-one-must-be-ignorant/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

[Image](https://sms4smile.com/quotes/i/d8f/claude-bernard-7455_agree_it-has-often-been-said-that-to-make-disc_1257729.jpg)

## Other authors on Theory

## More by Claude Bernard

> [In every enterprise ... the mind is always reasoning, and, even when we seem to act without a motive, an instinctive logic still directs…](https://sms4smile.com/quotes/claude-bernard/in-every-enterprise-the-mind-is-always-reasoning-and-even-when-we/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [Descriptive anatomy is to physiology what geography is to history, and just as it is not enough to know the typography of a country…](https://sms4smile.com/quotes/claude-bernard/descriptive-anatomy-is-to-physiology-what-geography-is-to-history-and/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [Mediocre men often have the most acquired knowledge. It is in the darker. It is in the darker regions of science that great men…](https://sms4smile.com/quotes/claude-bernard/mediocre-men-often-have-the-most-acquired-knowledge-it-is-in-the/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [Ardent desire for knowledge, in fact, is the one motive attracting and supporting investigators in their efforts; and just this knowledge, really grasped and…](https://sms4smile.com/quotes/claude-bernard/ardent-desire-for-knowledge-in-fact-is-the-one-motive-attracting-and/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [If I had to define life in a single phrase, I should clearly express my thought of throwing into relief one characteristic which, in…](https://sms4smile.com/quotes/claude-bernard/if-i-had-to-define-life-in-a-single-phrase-i-should-clearly-express/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [The investigator should have a robust faith - and yet not believe.](https://sms4smile.com/quotes/claude-bernard/the-investigator-should-have-a-robust-faith-and-yet-not-believe/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists founded chemistry…](https://sms4smile.com/quotes/claude-bernard/even-mistaken-hypotheses-and-theories-are-of-use-in-leading-to/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [Tout est poison, rien n'est poison, tout est une question de dose. Everything is poisonous, nothing is poisonous, it is all a matter of…](https://sms4smile.com/quotes/claude-bernard/tout-est-poison-rien-n-est-poison-tout-est-une-question-de-dose/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [A fact in itself is nothing. It is valuable only for the idea attached to it, or for the proof which it furnishes.](https://sms4smile.com/quotes/claude-bernard/a-fact-in-itself-is-nothing-it-is-valuable-only-for-the-idea-attached/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [It is what we know already that often prevents us from learning.](https://sms4smile.com/quotes/claude-bernard/it-is-what-we-know-already-that-often-prevents-us-from-learning/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [We must remain, in a word, in an intellectual disposition which seems paradoxical, but which, in my opinion, represents the true mind of the…](https://sms4smile.com/quotes/claude-bernard/we-must-remain-in-a-word-in-an-intellectual-disposition-which-seems/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [The fact that knowledge endlessly recedes as the investigator is about to grasp it is what constitutes at the same time his torment and…](https://sms4smile.com/quotes/claude-bernard/the-fact-that-knowledge-endlessly-recedes-as-the-investigator-is/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [But while I accept specialization in the practice, I reject it utterly in the theory of science.](https://sms4smile.com/quotes/claude-bernard/but-while-i-accept-specialization-in-the-practice-i-reject-it-utterly/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [Men who have excessive faith in their theories ... make poor observations, because they choose among the results of their experiments only what suits…](https://sms4smile.com/quotes/claude-bernard/men-who-have-excessive-faith-in-their-theories-make-poor-observations/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

> [First causes are outside the realm of science.](https://sms4smile.com/quotes/claude-bernard/first-causes-are-outside-the-realm-of-science/)

[Claude Bernard](https://sms4smile.com/quotes/author/claude-bernard/)

```json
{
    "@context": "https://schema.org",
    "@graph": [
        {
            "@type": "ItemList",
            "@id": "https://sms4smile.com/quotes/about/theory/claude-bernard/#itemlist",
            "name": "16 Theory Quotes By Claude Bernard",
            "numberOfItems": 16,
            "itemListElement": [
                {
                    "@type": "ListItem",
                    "position": 1,
                    "item": {
                        "@type": "Quotation",
                        "text": "We must alter theory to adapt it to nature, but not nature to adapt it to theory.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/we-must-alter-theory-to-adapt-it-to-nature-but-not-nature-to-adapt-it/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/83d/claude-bernard-7455_funny_we-must-alter-theory-to-adapt-it-to-natu_3034079.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/83d/claude-bernard-7455_funny_we-must-alter-theory-to-adapt-it-to-natu_3034079.png",
                            "url": "https://sms4smile.com/quotes/i/83d/claude-bernard-7455_funny_we-must-alter-theory-to-adapt-it-to-natu_3034079.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“We must alter theory to adapt it to nature, but not nature to adapt it to theory.” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 2,
                    "item": {
                        "@type": "Quotation",
                        "text": "We must keep our freedom of mind, ... and must believe that in nature what is absurd, according to our theories, is not always impossible.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/we-must-keep-our-freedom-of-mind-and-must-believe-that-in-nature-what/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/48b/claude-bernard-7455_absurd_we-must-keep-our-freedom-of-mind-and-mus_462409.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/48b/claude-bernard-7455_absurd_we-must-keep-our-freedom-of-mind-and-mus_462409.png",
                            "url": "https://sms4smile.com/quotes/i/48b/claude-bernard-7455_absurd_we-must-keep-our-freedom-of-mind-and-mus_462409.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“We must keep our freedom of mind, ... and must believe that in nature what is absurd, according to our…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 3,
                    "item": {
                        "@type": "Quotation",
                        "text": "A discovery is generally an unforeseen relation not included in theory.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/a-discovery-is-generally-an-unforeseen-relation-not-included-in-theory/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/dde/claude-bernard-7455_discovery_a-discovery-is-generally-an-unforeseen-r_1336421.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/dde/claude-bernard-7455_discovery_a-discovery-is-generally-an-unforeseen-r_1336421.png",
                            "url": "https://sms4smile.com/quotes/i/dde/claude-bernard-7455_discovery_a-discovery-is-generally-an-unforeseen-r_1336421.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“A discovery is generally an unforeseen relation not included in theory.” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 4,
                    "item": {
                        "@type": "Quotation",
                        "text": "But while I accept specialization in the practice, I reject it utterly in the theory of science.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/but-while-i-accept-specialization-in-the-practice-i-reject-it-utterly/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/62a/claude-bernard-7455_accepting_but-while-i-accept-specialization-in-the_329047.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/62a/claude-bernard-7455_accepting_but-while-i-accept-specialization-in-the_329047.png",
                            "url": "https://sms4smile.com/quotes/i/62a/claude-bernard-7455_accepting_but-while-i-accept-specialization-in-the_329047.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“But while I accept specialization in the practice, I reject it utterly in the theory of science.” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 5,
                    "item": {
                        "@type": "Quotation",
                        "text": "Men who believe too firmly in their theories, do not believe enough in the theories of others. So ... these despisers of their fellows ... make experiments only to destroy a theory, instead of to seek the truth.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/men-who-believe-too-firmly-in-their-theories-do-not-believe-enough-in/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/72f/claude-bernard-7455_believe_men-who-believe-too-firmly-in-their-theo_771336.jpg",
                            "contentUrl": "https://sms4smile.com/quotes/i/72f/claude-bernard-7455_believe_men-who-believe-too-firmly-in-their-theo_771336.jpg",
                            "url": "https://sms4smile.com/quotes/i/72f/claude-bernard-7455_believe_men-who-believe-too-firmly-in-their-theo_771336.jpg",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“Men who believe too firmly in their theories, do not believe enough in the theories of others. So ... these…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 6,
                    "item": {
                        "@type": "Quotation",
                        "text": "Well-observed facts, though brought to light by passing theories, will never die; they are the material on which alone the house of science will at last be built.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/well-observed-facts-though-brought-to-light-by-passing-theories-will/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/33c/claude-bernard-7455_accounts_well-observed-facts-though-brought-to-li_2194821.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/33c/claude-bernard-7455_accounts_well-observed-facts-though-brought-to-li_2194821.png",
                            "url": "https://sms4smile.com/quotes/i/33c/claude-bernard-7455_accounts_well-observed-facts-though-brought-to-li_2194821.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“Well-observed facts, though brought to light by passing theories, will never die; they are the material on…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 7,
                    "item": {
                        "@type": "Quotation",
                        "text": "When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory, even when the theory is supported by great names and generally accepted.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/when-we-meet-a-fact-which-contradicts-a-prevailing-theory-we-must/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/272/claude-bernard-7455_abandon_when-we-meet-a-fact-which-contradicts-a_439799.jpg",
                            "contentUrl": "https://sms4smile.com/quotes/i/272/claude-bernard-7455_abandon_when-we-meet-a-fact-which-contradicts-a_439799.jpg",
                            "url": "https://sms4smile.com/quotes/i/272/claude-bernard-7455_abandon_when-we-meet-a-fact-which-contradicts-a_439799.jpg",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 8,
                    "item": {
                        "@type": "Quotation",
                        "text": "[Those] who have an excessive faith in their theories or in their ideas are not only poorly disposed to make discoveries, but they also make very poor observations.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/those-who-have-an-excessive-faith-in-their-theories-or-in-their-ideas/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/0fe/claude-bernard-7455_discovery_those-who-have-an-excessive-faith-in-the_508168.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/0fe/claude-bernard-7455_discovery_those-who-have-an-excessive-faith-in-the_508168.png",
                            "url": "https://sms4smile.com/quotes/i/0fe/claude-bernard-7455_discovery_those-who-have-an-excessive-faith-in-the_508168.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“[Those] who have an excessive faith in their theories or in their ideas are not only poorly disposed to make…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 9,
                    "item": {
                        "@type": "Quotation",
                        "text": "Theories are like a stairway; by climbing, science widens its horizon more and more, because theories embody and necessarily include proportionately more facts as they advance.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/theories-are-like-a-stairway-by-climbing-science-widens-its-horizon/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/022/claude-bernard-7455_accounts_theories-are-like-a-stairway-by-climbing_2271463.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/022/claude-bernard-7455_accounts_theories-are-like-a-stairway-by-climbing_2271463.png",
                            "url": "https://sms4smile.com/quotes/i/022/claude-bernard-7455_accounts_theories-are-like-a-stairway-by-climbing_2271463.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“Theories are like a stairway; by climbing, science widens its horizon more and more, because theories embody…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 10,
                    "item": {
                        "@type": "Quotation",
                        "text": "In these researches I followed the principles of the experimental method that we have established, i.e., that, in presence of a well-noted, new fact which contradicts a theory, instead of keeping the theory and abandoning the fact, I should keep and study the fact, and I hastened to give up the theory.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/in-these-researches-i-followed-the-principles-of-the-experimental/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/b26/claude-bernard-7455_facts_in-these-researches-i-followed-the-princ_2930453.jpg",
                            "contentUrl": "https://sms4smile.com/quotes/i/b26/claude-bernard-7455_facts_in-these-researches-i-followed-the-princ_2930453.jpg",
                            "url": "https://sms4smile.com/quotes/i/b26/claude-bernard-7455_facts_in-these-researches-i-followed-the-princ_2930453.jpg",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“In these researches I followed the principles of the experimental method that we have established, i.e…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 11,
                    "item": {
                        "@type": "Quotation",
                        "text": "Men who have excessive faith in their theories or ideas are not only ill prepared for making discoveries; they also make very poor observations. Of necessity, they observe with a preconceived idea, and when they devise an experiment, they can see, in its results,only a confirmation of their theory. In this way they distort observation and often neglect very important facts because they do not further their aim.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/men-who-have-excessive-faith-in-their-theories-or-ideas-are-not-only/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/405/claude-bernard-7455_aim_men-who-have-excessive-faith-in-their-th_808088.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/405/claude-bernard-7455_aim_men-who-have-excessive-faith-in-their-th_808088.png",
                            "url": "https://sms4smile.com/quotes/i/405/claude-bernard-7455_aim_men-who-have-excessive-faith-in-their-th_808088.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“Men who have excessive faith in their theories or ideas are not only ill prepared for making discoveries…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 12,
                    "item": {
                        "@type": "Quotation",
                        "text": "Progress is achieved by exchanging our theories for new ones which go further than the old, until we find one based on a larger number of facts. ... Theories are only hypotheses, verified by more or less numerous facts. Those verified by the most facts are the best, but even then they are never final, never to be absolutely believed.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/progress-is-achieved-by-exchanging-our-theories-for-new-ones-which-go/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/282/claude-bernard-7455_exchanging_progress-is-achieved-by-exchanging-our-t_402826.jpg",
                            "contentUrl": "https://sms4smile.com/quotes/i/282/claude-bernard-7455_exchanging_progress-is-achieved-by-exchanging-our-t_402826.jpg",
                            "url": "https://sms4smile.com/quotes/i/282/claude-bernard-7455_exchanging_progress-is-achieved-by-exchanging-our-t_402826.jpg",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“Progress is achieved by exchanging our theories for new ones which go further than the old, until we find…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 13,
                    "item": {
                        "@type": "Quotation",
                        "text": "Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists founded chemistry by pursuing chimerical problems and theories which are false. In physical science, which is more advanced than biology, we might still cite men of science who make great discoveries by relying on false theories. It seems, indeed, a necessary weakness of our mind to be able to reach truth only across a multitude of errors and obstacles.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/even-mistaken-hypotheses-and-theories-are-of-use-in-leading-to-2/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/3ca/claude-bernard-7455_able_even-mistaken-hypotheses-and-theories-ar_528084.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/3ca/claude-bernard-7455_able_even-mistaken-hypotheses-and-theories-ar_528084.png",
                            "url": "https://sms4smile.com/quotes/i/3ca/claude-bernard-7455_able_even-mistaken-hypotheses-and-theories-ar_528084.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 14,
                    "item": {
                        "@type": "Quotation",
                        "text": "Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists founded chemistry by pursuing chimerical problems and theories which are false. In physical science, which is more advanced than biology, we might still cite men of science who make great discoveries by relying on false theories.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/even-mistaken-hypotheses-and-theories-are-of-use-in-leading-to/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/85f/claude-bernard-7455_able_even-mistaken-hypotheses-and-theories-ar_108694.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/85f/claude-bernard-7455_able_even-mistaken-hypotheses-and-theories-ar_108694.png",
                            "url": "https://sms4smile.com/quotes/i/85f/claude-bernard-7455_able_even-mistaken-hypotheses-and-theories-ar_108694.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 15,
                    "item": {
                        "@type": "Quotation",
                        "text": "Men who have excessive faith in their theories ... make poor observations, because they choose among the results of their experiments only what suits their object, neglecting whatever is unrelated to it and carefully setting aside everything which might tend toward the idea they wish to combat",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/men-who-have-excessive-faith-in-their-theories-make-poor-observations/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/280/claude-bernard-7455_combat_men-who-have-excessive-faith-in-their-th_372737.png",
                            "contentUrl": "https://sms4smile.com/quotes/i/280/claude-bernard-7455_combat_men-who-have-excessive-faith-in-their-th_372737.png",
                            "url": "https://sms4smile.com/quotes/i/280/claude-bernard-7455_combat_men-who-have-excessive-faith-in-their-th_372737.png",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“Men who have excessive faith in their theories ... make poor observations, because they choose among the…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                },
                {
                    "@type": "ListItem",
                    "position": 16,
                    "item": {
                        "@type": "Quotation",
                        "text": "It has often been said that, to make discoveries, one must be ignorant. This opinion, mistaken in itself, nevertheless conceals a truth. It means that it is better to know nothing than to keep in mind fixed ideas based on theories whose confirmation we constantly seek, neglecting meanwhile everything that fails to agree with them.",
                        "creator": {
                            "@type": "Person",
                            "name": "Claude Bernard"
                        },
                        "url": "https://sms4smile.com/quotes/claude-bernard/it-has-often-been-said-that-to-make-discoveries-one-must-be-ignorant/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/d8f/claude-bernard-7455_agree_it-has-often-been-said-that-to-make-disc_1257729.jpg",
                            "contentUrl": "https://sms4smile.com/quotes/i/d8f/claude-bernard-7455_agree_it-has-often-been-said-that-to-make-disc_1257729.jpg",
                            "url": "https://sms4smile.com/quotes/i/d8f/claude-bernard-7455_agree_it-has-often-been-said-that-to-make-disc_1257729.jpg",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“It has often been said that, to make discoveries, one must be ignorant. This opinion, mistaken in itself…” — Claude Bernard",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                }
            ]
        },
        {
            "@type": "CollectionPage",
            "@id": "https://sms4smile.com/quotes/about/theory/claude-bernard/#webpage",
            "url": "https://sms4smile.com/quotes/about/theory/claude-bernard/",
            "name": "Theory Quotes by Claude Bernard",
            "isPartOf": {
                "@id": "https://sms4smile.com/quotes/#website"
            },
            "mainEntity": {
                "@id": "https://sms4smile.com/quotes/about/theory/claude-bernard/#itemlist"
            },
            "primaryImageOfPage": {
                "@id": "https://sms4smile.com/quotes/i/83d/claude-bernard-7455_funny_we-must-alter-theory-to-adapt-it-to-natu_3034079.png"
            },
            "description": "16 Theory quotes by Claude Bernard. Plus more from Claude Bernard and more Theory sayings from other authors.",
            "breadcrumb": {
                "@id": "https://sms4smile.com/quotes/about/theory/claude-bernard/#breadcrumb"
            }
        },
        {
            "@type": "BreadcrumbList",
            "@id": "https://sms4smile.com/quotes/about/theory/claude-bernard/#breadcrumb",
            "itemListElement": [
                {
                    "@type": "ListItem",
                    "position": 1,
                    "name": "Home",
                    "item": "https://sms4smile.com/"
                },
                {
                    "@type": "ListItem",
                    "position": 2,
                    "name": "Quotes",
                    "item": "https://sms4smile.com/quotes/"
                },
                {
                    "@type": "ListItem",
                    "position": 3,
                    "name": "Topics",
                    "item": "https://sms4smile.com/quotes/categories/"
                },
                {
                    "@type": "ListItem",
                    "position": 4,
                    "name": "Theory",
                    "item": "https://sms4smile.com/quotes/about/theory/"
                },
                {
                    "@type": "ListItem",
                    "position": 5,
                    "name": "Claude Bernard",
                    "item": "https://sms4smile.com/quotes/about/theory/claude-bernard/"
                }
            ]
        },
        {
            "@type": "WebSite",
            "@id": "https://sms4smile.com/quotes/#website",
            "name": "SMS4Smile Quotes",
            "url": "https://sms4smile.com/quotes/",
            "publisher": {
                "@id": "https://sms4smile.com/quotes/#organization"
            }
        },
        {
            "@type": "Organization",
            "@id": "https://sms4smile.com/quotes/#organization",
            "name": "SMS4Smile Quotes",
            "url": "https://sms4smile.com/quotes/",
            "logo": {
                "@type": "ImageObject",
                "url": "https://sms4smile.com/quotes/wp-content/themes/sq/assets/icons/icon-512.png",
                "width": 512,
                "height": 512
            }
        }
    ]
}
```