--- title: "Meaning & Key Takeaway of: He who has a true idea, knows at that…" description: "\"He who has a true idea, knows at that same time that he has a true idea, nor can he doubt concerning the truth of the thing.\" — Baruch Spinoza" image: "https://sms4smile.com/quotes/i/ba1/baruch-spinoza-1338_doubt_he-who-has-a-true-idea-knows-at-that-sam_2964211.jpg" --- # He who has a true idea, knows at that same time that he… ![“He who has a true idea, knows at that same time that he has a true idea, nor can he doubt concerning the truth of the thing.” quote by Baruch Spinoza](https://sms4smile.com/quotes/i/ba1/baruch-spinoza-1338_doubt_he-who-has-a-true-idea-knows-at-that-sam_2964211.jpg) [Download](https://sms4smile.com/quotes/i/ba1/baruch-spinoza-1338_doubt_he-who-has-a-true-idea-knows-at-that-sam_2964211.jpg) [Open image](https://sms4smile.com/quotes/i/ba1/baruch-spinoza-1338_doubt_he-who-has-a-true-idea-knows-at-that-sam_2964211.jpg) > “He who has a true idea, knows at that same time that he has a true idea, nor can he doubt concerning the truth of the thing.” [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. A true idea guarantees its own truth, leaving no room for doubt about its reality. **In simple terms:** Knowing something true removes doubt. Key Takeaway Trust your insight. Themes philosophy epistemology confidence Mood thoughtful analytical Type philosophical reflective When to use this quote - academic study - personal decision‑making - ethical reasoning Key Concepts rationalism self‑knowledge Questions to Reflect On - How do you verify the truth of an idea? - Can certainty ever be harmful? A Different Perspective Even true ideas can be misapplied or misunderstood. ★ ★ ★ ★ ★ No ratings yet [Concerning Truth](https://sms4smile.com/quotes/about/concerning-truth-2725020/) [Doubt](https://sms4smile.com/quotes/about/doubt/) [Ethics](https://sms4smile.com/quotes/about/ethics/) [Idea Knows](https://sms4smile.com/quotes/about/idea-knows-4529473/) [Ideas](https://sms4smile.com/quotes/about/ideas/) [Inspirational](https://sms4smile.com/quotes/about/inspirational/) [Knows](https://sms4smile.com/quotes/about/knows/) [Time](https://sms4smile.com/quotes/about/time/) [True Idea](https://sms4smile.com/quotes/about/true-idea-1204072/) [Truth](https://sms4smile.com/quotes/about/truth/) [Words of wisdom](https://sms4smile.com/quotes/about/words-of-wisdom/) ## Related quotes > [“The Lord says that "truth is knowledge of things as they are and as they were, and as they are to come" (Sec. 93.)…](https://sms4smile.com/quotes/charles-w-penrose/the-lord-says-that-truth-is-knowledge-of-things-as-they-are-and-as/) [Charles W. Penrose](https://sms4smile.com/quotes/author/charles-w-penrose/) > [Never assume that you have attained truth. Don't make any claim to knowledge. Form no conclusion or evaluation concerning truth. The minute you do,…](https://sms4smile.com/quotes/mooji/never-assume-that-you-have-attained-truth-don-t-make-any-claim-to/) [Mooji](https://sms4smile.com/quotes/author/mooji/) > [You just try to be true to your idea of what is funny and what is also interesting.](https://sms4smile.com/quotes/john-oliver/you-just-try-to-be-true-to-your-idea-of-what-is-funny-and-what-is/) [John Oliver](https://sms4smile.com/quotes/author/john-oliver/) > [I have stayed true to that first idea that people can have a day in their lives that is very important and if they…](https://sms4smile.com/quotes/victoria-wood/i-have-stayed-true-to-that-first-idea-that-people-can-have-a-day-in/) [Victoria Wood](https://sms4smile.com/quotes/author/victoria-wood/) > [We do have to remain true to the idea of honesty within what you want to do.](https://sms4smile.com/quotes/kevin-drew/we-do-have-to-remain-true-to-the-idea-of-honesty-within-what-you-want/) [Kevin Drew](https://sms4smile.com/quotes/author/kevin-drew/) > [No one doubts but that we imagine time from the very fact that we imagine other bodies to be moved slower or faster or…](https://sms4smile.com/quotes/baruch-spinoza/no-one-doubts-but-that-we-imagine-time-from-the-very-fact-that-we/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [We have to treat others as part of who we are, rather than as a 'them' with whom we are in constant competition.](https://sms4smile.com/quotes/robert-neelly-bellah/we-have-to-treat-others-as-part-of-who-we-are-rather-than-as-a-them/) [Robert Neelly Bellah](https://sms4smile.com/quotes/author/robert-neelly-bellah/) > [But if men would give heed to the nature of substance they would doubt less concerning the Proposition that Existence appertains to the nature…](https://sms4smile.com/quotes/baruch-spinoza/but-if-men-would-give-heed-to-the-nature-of-substance-they-would/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [“An atheist is someone who is disappointed in his search of god. He is a man who strongly needed god but couldn't find him.…](https://sms4smile.com/quotes/bangambiki-habyarimana/an-atheist-is-someone-who-is-disappointed-in-his-search-of-god-he-is/) [Bangambiki Habyarimana](https://sms4smile.com/quotes/author/bangambiki-habyarimana/) > [When we love, it is not necessary to understand what is happening outside, because everything happens inside us instead.](https://sms4smile.com/quotes/paulo-coelho/when-we-love-it-is-not-necessary-to-understand-what-is-happening/) [Paulo Coelho](https://sms4smile.com/quotes/author/paulo-coelho/) > [Anyone can throw a jab, but it takes skill to land a punch and make it hurt.](https://sms4smile.com/quotes/deondriea-cantrice/anyone-can-throw-a-jab-but-it-takes-skill-to-land-a-punch-and-make-it/) [Deondriea Cantrice](https://sms4smile.com/quotes/author/deondriea-cantrice/) > [“The representation of women in the society, especially through mass media has been the most delusional act ever done on the grounds of human…](https://sms4smile.com/quotes/abhijit-naskar/the-representation-of-women-in-the-society-especially-through-mass/) [Abhijit Naskar](https://sms4smile.com/quotes/author/abhijit-naskar/) > [“Age doesn't mean Maturity but Senescence”](https://sms4smile.com/quotes/samuel-asumadu-sarkodie/age-doesn-t-mean-maturity-but-senescence/) [Samuel Asumadu-Sarkodie](https://sms4smile.com/quotes/author/samuel-asumadu-sarkodie/) > [...the Government must not think that they can stop this agitation. It will go on...We are here not because we are law-breakers; we are…](https://sms4smile.com/quotes/emmeline-pankhurst/the-government-must-not-think-that-they-can-stop-this-agitation-it/) [Emmeline Pankhurst](https://sms4smile.com/quotes/author/emmeline-pankhurst/) > [“If attempting to make the world a civilized one, makes you a bad woman in the eyes of the dumb patriarchal society, then, by…](https://sms4smile.com/quotes/abhijit-naskar/if-attempting-to-make-the-world-a-civilized-one-makes-you-a-bad-woman/) [Abhijit Naskar](https://sms4smile.com/quotes/author/abhijit-naskar/) ## More by Baruch Spinoza > [It is sure that those are most desirous of honour or glory who cry out loudest of its abuse and the vanity of the…](https://sms4smile.com/quotes/baruch-spinoza/it-is-sure-that-those-are-most-desirous-of-honour-or-glory-who-cry/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [. . . to know the order of nature, and regard the universe as orderly is the highest function of the mind.](https://sms4smile.com/quotes/baruch-spinoza/to-know-the-order-of-nature-and-regard-the-universe-as-orderly-is-the/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [If anyone conceives that he is loved by another, and believes that he has given no cause for such love, he will love that…](https://sms4smile.com/quotes/baruch-spinoza/if-anyone-conceives-that-he-is-loved-by-another-and-believes-that-he/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [The world would be happier if men had the same capacity to be silent that they have to speak.](https://sms4smile.com/quotes/baruch-spinoza/the-world-would-be-happier-if-men-had-the-same-capacity-to-be-silent/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [“So they will pursue their questions from cause to cause, till at last you take refuge in the will of God—in other words, the…](https://sms4smile.com/quotes/baruch-spinoza/so-they-will-pursue-their-questions-from-cause-to-cause-till-at-last/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [As men's habits of mind differ, so that some more readily embrace one form of faith, some another, for what moves one to pray…](https://sms4smile.com/quotes/baruch-spinoza/as-men-s-habits-of-mind-differ-so-that-some-more-readily-embrace-one/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [If a man had begun to hate an object of his love, so that love is thoroughly destroyed, he will, causes being equal, regard…](https://sms4smile.com/quotes/baruch-spinoza/if-a-man-had-begun-to-hate-an-object-of-his-love-so-that-love-is/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [I make this chief distinction between religion and superstition, that the latter is founded on ignorance, the former on knowledge.](https://sms4smile.com/quotes/baruch-spinoza/i-make-this-chief-distinction-between-religion-and-superstition-that/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [One and the same thing can at the same time be good, bad, and indifferent, e.g., music is good to the melancholy, bad to…](https://sms4smile.com/quotes/baruch-spinoza/one-and-the-same-thing-can-at-the-same-time-be-good-bad-and/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [A good thing which prevents us from enjoying a greater good is in truth an evil.](https://sms4smile.com/quotes/baruch-spinoza/a-good-thing-which-prevents-us-from-enjoying-a-greater-good-is-in/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [But if men would give heed to the nature of substance they would doubt less concerning the Proposition that Existence appertains to the nature…](https://sms4smile.com/quotes/baruch-spinoza/but-if-men-would-give-heed-to-the-nature-of-substance-they-would/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [The more intelligible a thing is, the more easily it is retained in the memory, and counterwise, the less intelligible it is, the more…](https://sms4smile.com/quotes/baruch-spinoza/the-more-intelligible-a-thing-is-the-more-easily-it-is-retained-in/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [In the state of nature, wrong-doing is impossible; or, if anyone does wrong, it is to himself, not to another. For no one by…](https://sms4smile.com/quotes/baruch-spinoza/in-the-state-of-nature-wrong-doing-is-impossible-or-if-anyone-does/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [For peace is not mere absence of war, but is a virtue that springs from force of character: for obedience is the constant will…](https://sms4smile.com/quotes/baruch-spinoza/for-peace-is-not-mere-absence-of-war-but-is-a-virtue-that-springs/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) > [Peace is not an absence of war, it is a virtue, a state of mind, a disposition for benevolence, confidence, justice.](https://sms4smile.com/quotes/baruch-spinoza/peace-is-not-an-absence-of-war-it-is-a-virtue-a-state-of-mind-a/) [Baruch Spinoza](https://sms4smile.com/quotes/author/baruch-spinoza/) [Explore all 248 Baruch Spinoza quotes ](https://sms4smile.com/quotes/author/baruch-spinoza/) ## More Doubt quotes > [I put myself in the student's place and remember the frustrations, doubts, determination, and desires I felt when I was going through the initial…](https://sms4smile.com/quotes/ted-martinez/i-put-myself-in-the-student-s-place-and-remember-the-frustrations/) [Ted Martinez](https://sms4smile.com/quotes/author/ted-martinez/) > [Because of the womb being a central phenomenon in the feminine body, the whole psychology of woman differs: she is non-aggressive, non-inquiring, non-questioning, non-doubting,…](https://sms4smile.com/quotes/rajneesh/because-of-the-womb-being-a-central-phenomenon-in-the-feminine-body/) [Rajneesh](https://sms4smile.com/quotes/author/rajneesh/) > [I don't doubt that straight white men have identity issues and identity complexes and struggle with defining themselves.](https://sms4smile.com/quotes/justin-simien/i-don-t-doubt-that-straight-white-men-have-identity-issues-and/) [Justin Simien](https://sms4smile.com/quotes/author/justin-simien/) > [“Where there is doubt (shanka), there is misery. The moment one begins to doubt the knowledge that, 'I am Chandubhai,' misery arises. Once one…](https://sms4smile.com/quotes/dada-bhagwan/where-there-is-doubt-shanka-there-is-misery-the-moment-one-begins-to/) [Dada Bhagwan](https://sms4smile.com/quotes/author/dada-bhagwan/) > [We know accurately only when we know little, with knowledge doubt increases.](https://sms4smile.com/quotes/johann-wolfgang-von-goethe/we-know-accurately-only-when-we-know-little-with-knowledge-doubt/) [Johann Wolfgang von Goethe](https://sms4smile.com/quotes/author/johann-wolfgang-von-goethe/) > [There is no doubt in my mind and I know in my time, there will be a Canadian basketball player playing for Toronto Raptors, 100%](https://sms4smile.com/quotes/masai-ujiri/there-is-no-doubt-in-my-mind-and-i-know-in-my-time-there-will-be-a/) [Masai Ujiri](https://sms4smile.com/quotes/author/masai-ujiri/) > [How could you feel worthless when God has honoured you by creating you and choosing you to be with Him, in this life and…](https://sms4smile.com/quotes/yasmin-mogahed/how-could-you-feel-worthless-when-god-has-honoured-you-by-creating/) [Yasmin Mogahed](https://sms4smile.com/quotes/author/yasmin-mogahed/) > [“Let no one hope to find in contemplation an escape from conflict, from anguish or from doubt. On the contrary, the deep, inexpressible certitude…](https://sms4smile.com/quotes/thomas-merton/let-no-one-hope-to-find-in-contemplation-an-escape-from-conflict-from/) [Thomas Merton](https://sms4smile.com/quotes/author/thomas-merton/) > [“Two powerful, little words I've learned to use when facing challenges, fears, and doubts— so what? ”](https://sms4smile.com/quotes/richelle-e-goodrich/two-powerful-little-words-i-ve-learned-to-use-when-facing-challenges/) [Richelle E. Goodrich](https://sms4smile.com/quotes/author/richelle-e-goodrich/) > [For diplomacy to be effective, words must be credible - and no one can now doubt the word of America.](https://sms4smile.com/quotes/george-w-bush/for-diplomacy-to-be-effective-words-must-be-credible-and-no-one-can/) [George W. Bush](https://sms4smile.com/quotes/author/george-w-bush/) > [Vision motivates, sustains and dispels doubt.](https://sms4smile.com/quotes/thomas-young/vision-motivates-sustains-and-dispels-doubt/) [Thomas Young](https://sms4smile.com/quotes/author/thomas-young/) > [One may not doubt that, somehow Good Shall come of Water and of Mud; And sure, the reverent eye must see A purpose in…](https://sms4smile.com/quotes/rupert-brooke/one-may-not-doubt-that-somehow-good-shall-come-of-water-and-of-mud/) [Rupert Brooke](https://sms4smile.com/quotes/author/rupert-brooke/) > [Let smiles overshadow sadness. Let faith make you believe. Let confidence wash away doubts. Let love complete your life.](https://sms4smile.com/quotes/ritu-ghatourey/let-smiles-overshadow-sadness-let-faith-make-you-believe-let/) [Ritu Ghatourey](https://sms4smile.com/quotes/author/ritu-ghatourey/) > [When in doubt, suggest that a subcommittee be appointed.](https://sms4smile.com/quotes/harry-chapman/when-in-doubt-suggest-that-a-subcommittee-be-appointed/) [Harry Chapman](https://sms4smile.com/quotes/author/harry-chapman/) > [“Those who contemplate never escape the doubt.”](https://sms4smile.com/quotes/henning-mankell/those-who-contemplate-never-escape-the-doubt/) [Henning Mankell](https://sms4smile.com/quotes/author/henning-mankell/) [Browse all 9,582 Doubt quotes ](https://sms4smile.com/quotes/about/doubt/) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "He who has a true idea, knows at that same time that he has a true idea, nor can he doubt concerning the truth of the thing.", "creator": { "@type": "Person", "name": "Baruch Spinoza" }, "isPartOf": { "@id": "https://sms4smile.com/quotes/#website" }, "url": "https://sms4smile.com/quotes/baruch-spinoza/he-who-has-a-true-idea-knows-at-that-same-time-that-he-has-a-true/", "about": { "@type": "Thing", "name": "Doubt" }, "@id": "https://sms4smile.com/quotes/baruch-spinoza/he-who-has-a-true-idea-knows-at-that-same-time-that-he-has-a-true/#quotation", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/ba1/baruch-spinoza-1338_doubt_he-who-has-a-true-idea-knows-at-that-sam_2964211.jpg", "contentUrl": "https://sms4smile.com/quotes/i/ba1/baruch-spinoza-1338_doubt_he-who-has-a-true-idea-knows-at-that-sam_2964211.jpg", "url": "https://sms4smile.com/quotes/i/ba1/baruch-spinoza-1338_doubt_he-who-has-a-true-idea-knows-at-that-sam_2964211.jpg", "width": 1080, "height": 1080, "caption": "“He who has a true idea, knows at that same time that he has a true idea, nor can he doubt concerning the…” — Baruch Spinoza", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } }, { "@type": "BreadcrumbList", "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": "Baruch Spinoza", "item": "https://sms4smile.com/quotes/author/baruch-spinoza/" }, { "@type": "ListItem", "position": 4, "name": "He who has a true idea,...", "item": "https://sms4smile.com/quotes/baruch-spinoza/he-who-has-a-true-idea-knows-at-that-same-time-that-he-has-a-true/" } ], "@id": "https://sms4smile.com/quotes/baruch-spinoza/he-who-has-a-true-idea-knows-at-that-same-time-that-he-has-a-true/#breadcrumb" }, { "@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 } } ] } ```