René Descartes Quotes

Common sense is the most fairly distributed thing in the world, for each one thinks he is so well-endowed with it that even those who are hardest to please in all other matters are not in the habit of desiring more of it than they already have.

I know that I exist; the question is, What is this ‘I’ that ‘I’ know.

In order to improve the mind, we ought less to learn, than to contemplate.

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.

Each problem that I solved became a rule which served afterwards to solve other problems.

It is not enough to have a good mind. The main thing is to use it well.

Doubt everything.

Common sense is the most fairly distributed thing in the world, for each one thinks he is so well-endowed with it that even those who are hardest to satisfy in all other matters are not in the habit of desiring more of it than they already have.

Cogito ergo sum: I think, therefore I am.

I think, therefore I am.