--- title: "19 Doubt Quotes By René Descartes" description: "19 Doubt quotes by René Descartes. Plus more from René Descartes and more Doubt sayings from other authors." image: "https://sms4smile.com/quotes/i/037/ren-descartes-1376_doubt_all-is-to-be-doubted-2309915_2309915.png" --- > [All is to be doubted.](https://sms4smile.com/quotes/ren-descartes/all-is-to-be-doubted/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/037/ren-descartes-1376_doubt_all-is-to-be-doubted-2309915_2309915.png) > [Doubt is the origin of wisdom](https://sms4smile.com/quotes/ren-descartes/doubt-is-the-origin-of-wisdom/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/364/ren-descartes-1376_aries_doubt-is-the-origin-of-wisdom-2659945_2659945.png) > [“De omnibus dubitandum. (Doubt everything.)”](https://sms4smile.com/quotes/ren-descartes/de-omnibus-dubitandum-doubt-everything/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/bc5/ren-descartes-1376_amor_de-omnibus-dubitandum-doubt-everything-3_306980.png) > [“I doubt, therefore I think, therefore I am.”](https://sms4smile.com/quotes/ren-descartes/i-doubt-therefore-i-think-therefore-i-am/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/053/ren-descartes-1376_doubt_i-doubt-therefore-i-think-therefore-i-am_237825.png) > [“...we ought also to consider as false all that is doubtful.”](https://sms4smile.com/quotes/ren-descartes/we-ought-also-to-consider-as-false-all-that-is-doubtful/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/b90/ren-descartes-1376_consider_we-ought-also-to-consider-as-false-all-t_2797761.png) > [“Dubium sapientiae initium. ( Doubt is the origin of wisdom .)”](https://sms4smile.com/quotes/ren-descartes/dubium-sapientiae-initium-doubt-is-the-origin-of-wisdom/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/87c/ren-descartes-1376_doubt_dubium-sapientiae-initium-doubt-is-the-o_1658361.png) > [“...we ought not meanwhile to make use of doubt in the conduct of life.”](https://sms4smile.com/quotes/ren-descartes/we-ought-not-meanwhile-to-make-use-of-doubt-in-the-conduct-of-life/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/f9f/ren-descartes-1376_advice_we-ought-not-meanwhile-to-make-use-of-do_1482013.png) > [If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as…](https://sms4smile.com/quotes/ren-descartes/if-you-would-be-a-real-seeker-after-truth-it-is-necessary-that-at/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/d2c/ren-descartes-1376_doubt_if-you-would-be-a-real-seeker-after-trut_1494178.png) > [The first precept was never to accept a thing as true until I knew it as such without a single doubt.](https://sms4smile.com/quotes/ren-descartes/the-first-precept-was-never-to-accept-a-thing-as-true-until-i-knew-it/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/ecb/ren-descartes-1376_doubt_the-first-precept-was-never-to-accept-a_2599840.png) > [I can doubt everything, except one thing, and that is the very fact that I doubt. Simply put - I think, therefore…](https://sms4smile.com/quotes/ren-descartes/i-can-doubt-everything-except-one-thing-and-that-is-the-very-fact/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/6c0/ren-descartes-1376_doubt_i-can-doubt-everything-except-one-thing_2634082.png) > [Dubito ergo cogito; cogito ergo sum. (I doubt, therefore I think; I think therefore I am)](https://sms4smile.com/quotes/ren-descartes/dubito-ergo-cogito-cogito-ergo-sum-i-doubt-therefore-i-think-i-think/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/3c9/ren-descartes-1376_doubt_dubito-ergo-cogito-cogito-ergo-sum-i-dou_2561847.png) > [In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of…](https://sms4smile.com/quotes/ren-descartes/in-order-to-seek-truth-it-is-necessary-once-in-the-course-of-our-life/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/68f/ren-descartes-1376_doubt_in-order-to-seek-truth-it-is-necessary-o_884390.png) > [“For I found myself embarrassed with so many doubts and errors that it seemed to me that the effort to instruct myself…](https://sms4smile.com/quotes/ren-descartes/for-i-found-myself-embarrassed-with-so-many-doubts-and-errors-that-it/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/790/ren-descartes-1376_doubt_for-i-found-myself-embarrassed-with-so-m_1496697.jpg) > [“The first was never to accept anything for true which I did not clearly know to be such; that is to say,…](https://sms4smile.com/quotes/ren-descartes/the-first-was-never-to-accept-anything-for-true-which-i-did-not/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/a41/ren-descartes-1376_doubt_the-first-was-never-to-accept-anything-f_2911697.png) > [I did not imitate the skeptics who doubt only for doubting's sake, and pretend to be always undecided; on the contrary, my…](https://sms4smile.com/quotes/ren-descartes/i-did-not-imitate-the-skeptics-who-doubt-only-for-doubting-s-sake-and/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/dbe/ren-descartes-1376_certainty_i-did-not-imitate-the-skeptics-who-doubt_1465824.png) > [For I found myself embarrassed with so many doubts and errors that it seemed to me that the effort to instruct myself…](https://sms4smile.com/quotes/ren-descartes/for-i-found-myself-embarrassed-with-so-many-doubts-and-errors-that-it-2/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/ed9/ren-descartes-1376_discovery_for-i-found-myself-embarrassed-with-so-m_2937434.png) > [... moral certainty is certainty which is sufficient to regulate our behaviour, or which measures up to the certainty we have on…](https://sms4smile.com/quotes/ren-descartes/moral-certainty-is-certainty-which-is-sufficient-to-regulate-our/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/386/ren-descartes-1376_behaviour_moral-certainty-is-certainty-which-is-su_277576.png) > [I am thing that thinks: that is, a things that doubts,affirms, denies, understands a few things, is ignorant of many things, is…](https://sms4smile.com/quotes/ren-descartes/i-am-thing-that-thinks-that-is-a-things-that-doubts-affirms-denies/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/f12/ren-descartes-1376_deny_i-am-thing-that-thinks-that-is-a-things_466648.jpg) > [“I am in doubt as to the propriety of making my first meditations in the place above mentioned matter of discourse; for…](https://sms4smile.com/quotes/ren-descartes/i-am-in-doubt-as-to-the-propriety-of-making-my-first-meditations-in/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) [Image](https://sms4smile.com/quotes/i/6f0/ren-descartes-1376_doubt_i-am-in-doubt-as-to-the-propriety-of-mak_3147649.jpg) ## Other authors on Doubt - [ ![](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b005/author-bertrand-russell-17477.jpg) Bertrand Russell 45 quotes ](https://sms4smile.com/quotes/about/doubt/bertrand-russell/) - [ ![](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b005/author-barack-obama-16275.jpg) Barack Obama 33 quotes ](https://sms4smile.com/quotes/about/doubt/barack-obama/) - [ ![](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b020/author-richard-p-feynman-78819.jpg) Richard P. Feynman 30 quotes ](https://sms4smile.com/quotes/about/doubt/richard-p-feynman/) - [Lailah Gifty Akita 30 quotes](https://sms4smile.com/quotes/about/doubt/lailah-gifty-akita/) - [ ![](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b010/author-friedrich-nietzsche-36363.jpg) Friedrich Nietzsche 28 quotes ](https://sms4smile.com/quotes/about/doubt/friedrich-nietzsche/) - [ ![](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b011/author-henry-david-thoreau-41473.jpg) Henry David Thoreau 24 quotes ](https://sms4smile.com/quotes/about/doubt/henry-david-thoreau/) - [ ![](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b024/author-william-shakespeare-95899.jpg) William Shakespeare 23 quotes ](https://sms4smile.com/quotes/about/doubt/william-shakespeare/) - [ ![](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b023/author-terry-mark-89514.jpg) Terry Mark 23 quotes ](https://sms4smile.com/quotes/about/doubt/terry-mark/) - [Mark Twain 23 quotes](https://sms4smile.com/quotes/about/doubt/mark-twain/) - [Ralph Waldo Emerson 22 quotes](https://sms4smile.com/quotes/about/doubt/ralph-waldo-emerson/) - [ ![](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b021/author-rush-limbaugh-81741.jpg) Rush Limbaugh 21 quotes ](https://sms4smile.com/quotes/about/doubt/rush-limbaugh/) - [Bangambiki Habyarimana 21 quotes](https://sms4smile.com/quotes/about/doubt/bangambiki-habyarimana/) ## More by René Descartes > [“My third maxim was to endeavour always to conquer myself rather than fortune, and change my desires rather than the order of the world,…](https://sms4smile.com/quotes/ren-descartes/my-third-maxim-was-to-endeavour-always-to-conquer-myself-rather-than/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [Your joy is your sorrow unmasked. And the self-same well from which your laughter rises was often-times filled with your tears.](https://sms4smile.com/quotes/ren-descartes/your-joy-is-your-sorrow-unmasked-and-the-self-same-well-from-which/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [So blind is the curiosity by which mortals are possessed, that they often conduct their minds along unexplored routes, having no reason to hope…](https://sms4smile.com/quotes/ren-descartes/so-blind-is-the-curiosity-by-which-mortals-are-possessed-that-they/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [“For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it. The greatest minds, as they…](https://sms4smile.com/quotes/ren-descartes/for-to-be-possessed-of-a-vigorous-mind-is-not-enough-the-prime/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [“It is useful to know something of the manners of different nations, that we may be enabled to form a more correct judgment regarding…](https://sms4smile.com/quotes/ren-descartes/it-is-useful-to-know-something-of-the-manners-of-different-nations/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [A state is better governed which has few laws, and those laws strictly observed.](https://sms4smile.com/quotes/ren-descartes/a-state-is-better-governed-which-has-few-laws-and-those-laws-strictly/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [ \[About Pierre de Fermat\] It cannot be denied that he has had many exceptional ideas, and that he is a highly intelligent man. For… ](https://sms4smile.com/quotes/ren-descartes/about-pierre-de-fermat-it-cannot-be-denied-that-he-has-had-many/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [Science is practical philosophy.](https://sms4smile.com/quotes/ren-descartes/science-is-practical-philosophy/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [ “And what more am I? I look for aid to the imagination. \[But how mistakenly!\] I am not that assemblage of limbs we call… ](https://sms4smile.com/quotes/ren-descartes/and-what-more-am-i-i-look-for-aid-to-the-imagination-but-how/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [“And, in fine, of false sciences I thought I knew the worth sufficiently to escape being deceived by the professions of an alchemist, the…](https://sms4smile.com/quotes/ren-descartes/and-in-fine-of-false-sciences-i-thought-i-knew-the-worth-sufficiently/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has.](https://sms4smile.com/quotes/ren-descartes/nothing-is-more-fairly-distributed-than-common-sense-no-one-thinks-he/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [If I go for the alternative which is false, then obviously I shall be in error; if I take the other side, then it…](https://sms4smile.com/quotes/ren-descartes/if-i-go-for-the-alternative-which-is-false-then-obviously-i-shall-be/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [Everything is self-evident.](https://sms4smile.com/quotes/ren-descartes/everything-is-self-evident/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [Neither the true nor the false roots are always real; sometimes they are imaginary; that is, while we can always imagine as many roots…](https://sms4smile.com/quotes/ren-descartes/neither-the-true-nor-the-false-roots-are-always-real-sometimes-they/) [Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/) > [It is only intelligence that is divided equally between people because everybody thinks he/she is enough wise](https://sms4smile.com/quotes/ren-descartes/it-is-only-intelligence-that-is-divided-equally-between-people/) [René Descartes](https://sms4smile.com/quotes/author/ren-descartes/) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "ItemList", "@id": "https://sms4smile.com/quotes/about/doubt/ren-descartes/#itemlist", "name": "19 Doubt Quotes By René Descartes", "numberOfItems": 19, "itemListElement": [ { "@type": "ListItem", "position": 1, "item": { "@type": "Quotation", "text": "All is to be doubted.", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/all-is-to-be-doubted/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/037/ren-descartes-1376_doubt_all-is-to-be-doubted-2309915_2309915.png", "contentUrl": "https://sms4smile.com/quotes/i/037/ren-descartes-1376_doubt_all-is-to-be-doubted-2309915_2309915.png", "url": "https://sms4smile.com/quotes/i/037/ren-descartes-1376_doubt_all-is-to-be-doubted-2309915_2309915.png", "width": 1080, "height": 1080, "caption": "“All is to be doubted.” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 2, "item": { "@type": "Quotation", "text": "Doubt is the origin of wisdom", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/doubt-is-the-origin-of-wisdom/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/364/ren-descartes-1376_aries_doubt-is-the-origin-of-wisdom-2659945_2659945.png", "contentUrl": "https://sms4smile.com/quotes/i/364/ren-descartes-1376_aries_doubt-is-the-origin-of-wisdom-2659945_2659945.png", "url": "https://sms4smile.com/quotes/i/364/ren-descartes-1376_aries_doubt-is-the-origin-of-wisdom-2659945_2659945.png", "width": 1080, "height": 1080, "caption": "“Doubt is the origin of wisdom” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 3, "item": { "@type": "Quotation", "text": "“De omnibus dubitandum. (Doubt everything.)”", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/de-omnibus-dubitandum-doubt-everything/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/bc5/ren-descartes-1376_amor_de-omnibus-dubitandum-doubt-everything-3_306980.png", "contentUrl": "https://sms4smile.com/quotes/i/bc5/ren-descartes-1376_amor_de-omnibus-dubitandum-doubt-everything-3_306980.png", "url": "https://sms4smile.com/quotes/i/bc5/ren-descartes-1376_amor_de-omnibus-dubitandum-doubt-everything-3_306980.png", "width": 1080, "height": 1080, "caption": "“De omnibus dubitandum. (Doubt everything.)” — René Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 4, "item": { "@type": "Quotation", "text": "“I doubt, therefore I think, therefore I am.”", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/i-doubt-therefore-i-think-therefore-i-am/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/053/ren-descartes-1376_doubt_i-doubt-therefore-i-think-therefore-i-am_237825.png", "contentUrl": "https://sms4smile.com/quotes/i/053/ren-descartes-1376_doubt_i-doubt-therefore-i-think-therefore-i-am_237825.png", "url": "https://sms4smile.com/quotes/i/053/ren-descartes-1376_doubt_i-doubt-therefore-i-think-therefore-i-am_237825.png", "width": 1080, "height": 1080, "caption": "“I doubt, therefore I think, therefore I am.” — René Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 5, "item": { "@type": "Quotation", "text": "“...we ought also to consider as false all that is doubtful.”", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/we-ought-also-to-consider-as-false-all-that-is-doubtful/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/b90/ren-descartes-1376_consider_we-ought-also-to-consider-as-false-all-t_2797761.png", "contentUrl": "https://sms4smile.com/quotes/i/b90/ren-descartes-1376_consider_we-ought-also-to-consider-as-false-all-t_2797761.png", "url": "https://sms4smile.com/quotes/i/b90/ren-descartes-1376_consider_we-ought-also-to-consider-as-false-all-t_2797761.png", "width": 1080, "height": 1080, "caption": "“...we ought also to consider as false all that is doubtful.” — René Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 6, "item": { "@type": "Quotation", "text": "“Dubium sapientiae initium. ( Doubt is the origin of wisdom .)”", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/dubium-sapientiae-initium-doubt-is-the-origin-of-wisdom/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/87c/ren-descartes-1376_doubt_dubium-sapientiae-initium-doubt-is-the-o_1658361.png", "contentUrl": "https://sms4smile.com/quotes/i/87c/ren-descartes-1376_doubt_dubium-sapientiae-initium-doubt-is-the-o_1658361.png", "url": "https://sms4smile.com/quotes/i/87c/ren-descartes-1376_doubt_dubium-sapientiae-initium-doubt-is-the-o_1658361.png", "width": 1080, "height": 1080, "caption": "“Dubium sapientiae initium. ( Doubt is the origin of wisdom .)” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 7, "item": { "@type": "Quotation", "text": "“...we ought not meanwhile to make use of doubt in the conduct of life.”", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/we-ought-not-meanwhile-to-make-use-of-doubt-in-the-conduct-of-life/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/f9f/ren-descartes-1376_advice_we-ought-not-meanwhile-to-make-use-of-do_1482013.png", "contentUrl": "https://sms4smile.com/quotes/i/f9f/ren-descartes-1376_advice_we-ought-not-meanwhile-to-make-use-of-do_1482013.png", "url": "https://sms4smile.com/quotes/i/f9f/ren-descartes-1376_advice_we-ought-not-meanwhile-to-make-use-of-do_1482013.png", "width": 1080, "height": 1080, "caption": "“...we ought not meanwhile to make use of doubt in the conduct of life.” — René Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 8, "item": { "@type": "Quotation", "text": "If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/if-you-would-be-a-real-seeker-after-truth-it-is-necessary-that-at/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/d2c/ren-descartes-1376_doubt_if-you-would-be-a-real-seeker-after-trut_1494178.png", "contentUrl": "https://sms4smile.com/quotes/i/d2c/ren-descartes-1376_doubt_if-you-would-be-a-real-seeker-after-trut_1494178.png", "url": "https://sms4smile.com/quotes/i/d2c/ren-descartes-1376_doubt_if-you-would-be-a-real-seeker-after-trut_1494178.png", "width": 1080, "height": 1080, "caption": "“If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far…” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 9, "item": { "@type": "Quotation", "text": "The first precept was never to accept a thing as true until I knew it as such without a single doubt.", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/the-first-precept-was-never-to-accept-a-thing-as-true-until-i-knew-it/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/ecb/ren-descartes-1376_doubt_the-first-precept-was-never-to-accept-a_2599840.png", "contentUrl": "https://sms4smile.com/quotes/i/ecb/ren-descartes-1376_doubt_the-first-precept-was-never-to-accept-a_2599840.png", "url": "https://sms4smile.com/quotes/i/ecb/ren-descartes-1376_doubt_the-first-precept-was-never-to-accept-a_2599840.png", "width": 1080, "height": 1080, "caption": "“The first precept was never to accept a thing as true until I knew it as such without a single doubt.” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 10, "item": { "@type": "Quotation", "text": "I can doubt everything, except one thing, and that is the very fact that I doubt. Simply put - I think, therefore I am", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/i-can-doubt-everything-except-one-thing-and-that-is-the-very-fact/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/6c0/ren-descartes-1376_doubt_i-can-doubt-everything-except-one-thing_2634082.png", "contentUrl": "https://sms4smile.com/quotes/i/6c0/ren-descartes-1376_doubt_i-can-doubt-everything-except-one-thing_2634082.png", "url": "https://sms4smile.com/quotes/i/6c0/ren-descartes-1376_doubt_i-can-doubt-everything-except-one-thing_2634082.png", "width": 1080, "height": 1080, "caption": "“I can doubt everything, except one thing, and that is the very fact that I doubt. Simply put - I think…” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 11, "item": { "@type": "Quotation", "text": "Dubito ergo cogito; cogito ergo sum. (I doubt, therefore I think; I think therefore I am)", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/dubito-ergo-cogito-cogito-ergo-sum-i-doubt-therefore-i-think-i-think/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/3c9/ren-descartes-1376_doubt_dubito-ergo-cogito-cogito-ergo-sum-i-dou_2561847.png", "contentUrl": "https://sms4smile.com/quotes/i/3c9/ren-descartes-1376_doubt_dubito-ergo-cogito-cogito-ergo-sum-i-dou_2561847.png", "url": "https://sms4smile.com/quotes/i/3c9/ren-descartes-1376_doubt_dubito-ergo-cogito-cogito-ergo-sum-i-dou_2561847.png", "width": 1080, "height": 1080, "caption": "“Dubito ergo cogito; cogito ergo sum. (I doubt, therefore I think; I think therefore I am)” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 12, "item": { "@type": "Quotation", "text": "In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all things.", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/in-order-to-seek-truth-it-is-necessary-once-in-the-course-of-our-life/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/68f/ren-descartes-1376_doubt_in-order-to-seek-truth-it-is-necessary-o_884390.png", "contentUrl": "https://sms4smile.com/quotes/i/68f/ren-descartes-1376_doubt_in-order-to-seek-truth-it-is-necessary-o_884390.png", "url": "https://sms4smile.com/quotes/i/68f/ren-descartes-1376_doubt_in-order-to-seek-truth-it-is-necessary-o_884390.png", "width": 1080, "height": 1080, "caption": "“In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all…” — René Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 13, "item": { "@type": "Quotation", "text": "“For I found myself embarrassed with so many doubts and errors that it seemed to me that the effort to instruct myself had no effect other than the increasing discovery of my own ignorance”", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/for-i-found-myself-embarrassed-with-so-many-doubts-and-errors-that-it/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/790/ren-descartes-1376_doubt_for-i-found-myself-embarrassed-with-so-m_1496697.jpg", "contentUrl": "https://sms4smile.com/quotes/i/790/ren-descartes-1376_doubt_for-i-found-myself-embarrassed-with-so-m_1496697.jpg", "url": "https://sms4smile.com/quotes/i/790/ren-descartes-1376_doubt_for-i-found-myself-embarrassed-with-so-m_1496697.jpg", "width": 1080, "height": 1080, "caption": "“For I found myself embarrassed with so many doubts and errors that it seemed to me that the effort to…” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 14, "item": { "@type": "Quotation", "text": "“The first was never to accept anything for true which I did not clearly know to be such; that is to say, carefully to avoid precipitancy and prejudice, and to comprise nothing more in my judgment than what was presented to my mind so clearly and distinctly as to exclude all ground of doubt.”", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/the-first-was-never-to-accept-anything-for-true-which-i-did-not/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/a41/ren-descartes-1376_doubt_the-first-was-never-to-accept-anything-f_2911697.png", "contentUrl": "https://sms4smile.com/quotes/i/a41/ren-descartes-1376_doubt_the-first-was-never-to-accept-anything-f_2911697.png", "url": "https://sms4smile.com/quotes/i/a41/ren-descartes-1376_doubt_the-first-was-never-to-accept-anything-f_2911697.png", "width": 1080, "height": 1080, "caption": "“The first was never to accept anything for true which I did not clearly know to be such; that is to say…” — René Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 15, "item": { "@type": "Quotation", "text": "I did not imitate the skeptics who doubt only for doubting's sake, and pretend to be always undecided; on the contrary, my whole intention was to arrive at a certainty, and to dig away the drift and the sand until I reached the rock or the clay beneath.", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/i-did-not-imitate-the-skeptics-who-doubt-only-for-doubting-s-sake-and/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/dbe/ren-descartes-1376_certainty_i-did-not-imitate-the-skeptics-who-doubt_1465824.png", "contentUrl": "https://sms4smile.com/quotes/i/dbe/ren-descartes-1376_certainty_i-did-not-imitate-the-skeptics-who-doubt_1465824.png", "url": "https://sms4smile.com/quotes/i/dbe/ren-descartes-1376_certainty_i-did-not-imitate-the-skeptics-who-doubt_1465824.png", "width": 1080, "height": 1080, "caption": "“I did not imitate the skeptics who doubt only for doubting's sake, and pretend to be always undecided; on…” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 16, "item": { "@type": "Quotation", "text": "For I found myself embarrassed with so many doubts and errors that it seemed to me that the effort to instruct myself had no effect other than th eincreasing discovery of my own ignorance", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/for-i-found-myself-embarrassed-with-so-many-doubts-and-errors-that-it-2/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/ed9/ren-descartes-1376_discovery_for-i-found-myself-embarrassed-with-so-m_2937434.png", "contentUrl": "https://sms4smile.com/quotes/i/ed9/ren-descartes-1376_discovery_for-i-found-myself-embarrassed-with-so-m_2937434.png", "url": "https://sms4smile.com/quotes/i/ed9/ren-descartes-1376_discovery_for-i-found-myself-embarrassed-with-so-m_2937434.png", "width": 1080, "height": 1080, "caption": "“For I found myself embarrassed with so many doubts and errors that it seemed to me that the effort to…” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 17, "item": { "@type": "Quotation", "text": "... moral certainty is certainty which is sufficient to regulate our behaviour, or which measures up to the certainty we have on matters relating to the conduct of life which we never normally doubt, though we know that it is possible, absolutely speaking, that they may be false.", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/moral-certainty-is-certainty-which-is-sufficient-to-regulate-our/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/386/ren-descartes-1376_behaviour_moral-certainty-is-certainty-which-is-su_277576.png", "contentUrl": "https://sms4smile.com/quotes/i/386/ren-descartes-1376_behaviour_moral-certainty-is-certainty-which-is-su_277576.png", "url": "https://sms4smile.com/quotes/i/386/ren-descartes-1376_behaviour_moral-certainty-is-certainty-which-is-su_277576.png", "width": 1080, "height": 1080, "caption": "“... moral certainty is certainty which is sufficient to regulate our behaviour, or which measures up to the…” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 18, "item": { "@type": "Quotation", "text": "I am thing that thinks: that is, a things that doubts,affirms, denies, understands a few things, is ignorant of many things, is willing, is unwilling, and also which imagines and has sensory perceptions.", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/i-am-thing-that-thinks-that-is-a-things-that-doubts-affirms-denies/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/f12/ren-descartes-1376_deny_i-am-thing-that-thinks-that-is-a-things_466648.jpg", "contentUrl": "https://sms4smile.com/quotes/i/f12/ren-descartes-1376_deny_i-am-thing-that-thinks-that-is-a-things_466648.jpg", "url": "https://sms4smile.com/quotes/i/f12/ren-descartes-1376_deny_i-am-thing-that-thinks-that-is-a-things_466648.jpg", "width": 1080, "height": 1080, "caption": "“I am thing that thinks: that is, a things that doubts,affirms, denies, understands a few things, is ignorant…” — Rene Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 19, "item": { "@type": "Quotation", "text": "“I am in doubt as to the propriety of making my first meditations in the place above mentioned matter of discourse; for these are so metaphysical, and so uncommon, as not, perhaps, to be acceptable to every one. And yet, that it may be determined whether the foundations that I have laid are sufficiently secure, I find myself in a measure constrained to advert to them. I had long before remarked that, in relation to practice, it is sometimes necessary to adopt, as if above doubt, opinions which we discern to be highly uncertain, as has been already said; but as I then desired to give my attention solely to the search after truth, I thought that a procedure exactly the opposite was called for, and that I ought to reject as absolutely false all opinions in regard to which I could suppose the least ground for doubt, in order to ascertain whether after that there remained aught in my belief that was wholly indubitable. Accordingly, seeing that our senses sometimes deceive us, I was willing to suppose that there existed nothing really such as they presented to us; and because some men err in reasoning, and fall into paralogisms, even on the simplest matters of geometry, I, convinced that I was as open to error as any other, rejected as false all the reasonings I had hitherto taken for demonstrations; and finally, when I considered that the very same thoughts (presentations) which we experience when awake may also be experienced when we are asleep, while there is at that time not one of them true, I supposed that all the objects (presentations) that had ever entered into my mind when awake, had in them no more truth than the illusions of my dreams. But immediately upon this I observed that, whilst I thus wished to think that all was false, it was absolutely necessary that I, who thus thought, should be somewhat; and as I observed that this truth, I think, therefore I am [\"cogito ergo sum\"], was so certain and of such evidence that no ground of doubt, however extravagant, could be alleged by the sceptics capable of shaking it, I concluded that I might, without scruple, accept it as the first principle of the philosophy of which I was in search”", "creator": { "@type": "Person", "name": "René Descartes" }, "url": "https://sms4smile.com/quotes/ren-descartes/i-am-in-doubt-as-to-the-propriety-of-making-my-first-meditations-in/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/6f0/ren-descartes-1376_doubt_i-am-in-doubt-as-to-the-propriety-of-mak_3147649.jpg", "contentUrl": "https://sms4smile.com/quotes/i/6f0/ren-descartes-1376_doubt_i-am-in-doubt-as-to-the-propriety-of-mak_3147649.jpg", "url": "https://sms4smile.com/quotes/i/6f0/ren-descartes-1376_doubt_i-am-in-doubt-as-to-the-propriety-of-mak_3147649.jpg", "width": 1080, "height": 1080, "caption": "“I am in doubt as to the propriety of making my first meditations in the place above mentioned matter of…” — René Descartes", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } } ] }, { "@type": "CollectionPage", "@id": "https://sms4smile.com/quotes/about/doubt/ren-descartes/#webpage", "url": "https://sms4smile.com/quotes/about/doubt/ren-descartes/", "name": "Doubt Quotes by René Descartes", "isPartOf": { "@id": "https://sms4smile.com/quotes/#website" }, "mainEntity": { "@id": "https://sms4smile.com/quotes/about/doubt/ren-descartes/#itemlist" }, "primaryImageOfPage": { "@id": "https://sms4smile.com/quotes/i/037/ren-descartes-1376_doubt_all-is-to-be-doubted-2309915_2309915.png" }, "description": "19 Doubt quotes by René Descartes. Plus more from René Descartes and more Doubt sayings from other authors.", "breadcrumb": { "@id": "https://sms4smile.com/quotes/about/doubt/ren-descartes/#breadcrumb" } }, { "@type": "BreadcrumbList", "@id": "https://sms4smile.com/quotes/about/doubt/ren-descartes/#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": "Doubt", "item": "https://sms4smile.com/quotes/about/doubt/" }, { "@type": "ListItem", "position": 5, "name": "René Descartes", "item": "https://sms4smile.com/quotes/about/doubt/ren-descartes/" } ] }, { "@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 } } ] } ```