René Descartes Quotes

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But as I considered the matter carefully it gradually came to light that all those matters only were referred to Mathematics in which order and measurement are investigated, and it makes no difference whether it be in numbers, figures, stars, sounds or any other objects that the question of measurement arises.

René Descartes
We must believe that all the sciences are so interconnected, that it is much easier to study them all together than to isolate one from all the others. If, therefore, anyone wishes to search out the truth of things in serious earnest, he ought not to select one special science; for all the sciences are cojoined with each other and interdependent..

René Descartes
Although my knowledge grows more and more, nevertheless I do not for that reason believe that it can ever be actually infinite, since it can never reach a point so high that it will be unable to attain any greater increase.

René Descartes
Be that as it may, there is fixed in my mind a certain opinion of long [21] standing, namely that there exists a God who is able to do anything and by whom I, such as I am, have been created. How do I know that he did not bring it about that there is no earth at all, no heavens, no extended thing, no shape, no size, no place, and yet bringing it about that all these things appear to me to exist precisely as they do now?

René Descartes
The mind is so intimately dependent upon the condition and relation of the organs of the body, that if any means can ever be found to render men wiser and more ingenious than hitherto, I believe that it is in medicine they must be sought for.

René Descartes
I accept no principles of physics which are not also accepted in mathematics...

René Descartes
Method consists entirely in the order and disposition of the objects towards which our mental vision must be directed if we would find out any truth.

René Descartes
I should consider that I know nothing about physics if I were able to explain only how things might be, and were unable to demonstrate that they could not be otherwise. For, having reduced physics to mathematics, the demonstration is now possible, and I think that I can do it within the small compass of my knowledge.

René Descartes
God always preserves in the world just so much motion as He impressed on it at its first creation.

René Descartes
Regard this body as a machine which, having been made by the hand of God, is incomparably better ordered than any machine that can be devised by man, and contains in itself movements more wonderful than those in any machine.... it is for all practical purposes impossible for a machine to have enough organs to make it act in all the contingencies of life in the way in which our reason makes us act.

René Descartes
Anyone who, upon looking down at his bare feet, doesn't laugh, has either no sense of symmetry or no sense of humor.

René Descartes
Even if I were to suppose that I was dreaming and whatever I saw or imagined was false, yet I could not deny that ideas were truly in my mind.

René Descartes
But possibly I am something more than I suppose myself to be.

René Descartes
I was convinced that our beliefs are based much more on custom and example than on any certain knowledge.

René Descartes
On the one hand I have a clear and distinct idea of myself, in so far as I am a thinking, non-extended thing; and on the other hand I have a distinct idea of body, in so far a this is
simply an extended, non-thinking thing. And, accordingly, it is certain that I am really distinct from my body, and exist without it.

René Descartes
Here I beg you to observe in passing that the scruples that prevented ancient writers from using arithmetical terms in geometry, and which can only be a consequence of their inability to perceive clearly the relation between these two subjects, introduced much obscurity and confusion into their explanations.

René Descartes
And I shall always hold myself more obliged to those by whose favour I enjoy uninterrupted leisure than to any who might offer me the most honourable positions in the world.

René Descartes
When it is not in our power to determine what is true, we ought to act accordingly to what is most probable.

René Descartes
Archimedes, that he might transport the entire globe... demanded only a point that was firm and immovable; so also, I shall be entitled to entertain the highest expectations, if I am fortunate enough to discover only one thing that is certain and indubitable.

René Descartes
I can establish as a general rule that all things which I perceive very clearly and distinctly are true.

René Descartes
But if there were machines bearing the image of our bodies, and capable of imitating our actions as far as it is morally possible, there would still remain two most certain tests whereby to know that they were not therefore really men.

René Descartes
I hope that posterity will judge me kindly, not only as to the things which I have explained, but also to those which I have intentionally omitted so as to leave to others the pleasure of discovery.

René Descartes
Now therefore, that my mind is free from all cares, and that I have obtained for myself assured leisure in peaceful solitude, I shall apply myself seriously and freely to the general destruction of all my former opinions.

René Descartes
I experienced in myself a certain capacity for judging which I have doubtless received from God, like all the other things that I possess; and as He could not desire to deceive me, it is clear that He has not given me a faculty that will lead me to err if I use it aright.

René 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 for success, but merely being willing to risk the experiment of finding whether the truth they seek lies there.

René Descartes