---
title: "6 Exist Quotes By René Descartes"
description: "6 Exist quotes by René Descartes. Plus more from René Descartes and more Exist sayings from other authors."
image: "https://sms4smile.com/quotes/i/f5c/ren-descartes-1376_exist_i-know-that-i-exist-the-question-is-what_659681.png"
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> [I know that I exist; the question is, What is this 'I' that 'I' know.](https://sms4smile.com/quotes/ren-descartes/i-know-that-i-exist-the-question-is-what-is-this-i-that-i-know/)

[Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/)

[Image](https://sms4smile.com/quotes/i/f5c/ren-descartes-1376_exist_i-know-that-i-exist-the-question-is-what_659681.png)

> [Be that as it may, there is fixed in my mind a certain opinion of long standing, namely that there exists a…](https://sms4smile.com/quotes/ren-descartes/be-that-as-it-may-there-is-fixed-in-my-mind-a-certain-opinion-of-long/)

[Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/)

[Image](https://sms4smile.com/quotes/i/fb8/ren-descartes-1376_able_be-that-as-it-may-there-is-fixed-in-my-m_961732.png)

> [I am thinking, therefore I exist. (...) I was a substance whose whole essence or nature is solely to think, and which…](https://sms4smile.com/quotes/ren-descartes/i-am-thinking-therefore-i-exist-i-was-a-substance-whose-whole-essence/)

[Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/)

[Image](https://sms4smile.com/quotes/i/dd7/ren-descartes-1376_body_i-am-thinking-therefore-i-exist-i-was-a_1343213.png)

> [“But doubtless I did exist, if I persuaded myself of something. But there is some deceiver or other who is supremely powerful…](https://sms4smile.com/quotes/ren-descartes/but-doubtless-i-did-exist-if-i-persuaded-myself-of-something-but/)

[René Descartes](https://sms4smile.com/quotes/author/ren-descartes/)

[Image](https://sms4smile.com/quotes/i/d5a/ren-descartes-1376_exist_but-doubtless-i-did-exist-if-i-persuaded_1713717.png)

> [The only secure knowledge is that I exist.](https://sms4smile.com/quotes/ren-descartes/the-only-secure-knowledge-is-that-i-exist/)

[Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/)

[Image](https://sms4smile.com/quotes/i/4e3/ren-descartes-1376_cybersecurity_the-only-secure-knowledge-is-that-i-exis_2230525.png)

> [I think therefore I exist.](https://sms4smile.com/quotes/ren-descartes/i-think-therefore-i-exist/)

[Rene Descartes](https://sms4smile.com/quotes/author/ren-descartes/)

[Image](https://sms4smile.com/quotes/i/56b/ren-descartes-1376_exist_i-think-therefore-i-exist-2702836_2702836.png)

## Other authors on Exist

## 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/)

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