Honesty is the first chapter in the book of wisdom.

Most of what matters in our lives takes place in our absence.

We seldom realize, for example that our most private thoughts and emotions are not actually our own. For we think in terms of languages and images which we did not invent, but which were given to us by our society.

We are all born ignorant, but one must work hard to remain stupid

Adapt what is useful, reject what is useless, and add what is specifically your own.

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

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

It is necessary to keep one's compass in one's eyes and not in the hand, for the hands execute, but the eye judges.

Act as if the maxim of your action were to become through your will a general natural law

You are not a drop in the ocean. You are the entire ocean, in a drop.

One who loses wealth loses much. One who loses a friend loses more. But one who loses courage loses all.

Intelligence is a moral category.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

Every intelligent individual wants to know what makes him tick, and yet is at once fascinated and frustrated by the fact that oneself is the most difficult of all things to know.

Rational discussion is useful only when there is a significant base of shared assumptions.

One just needs a little alertness to see and find out: Life is really a great cosmic laughter.

Better mad with the rest of the world than wise alone.

Time flies over us, but leaves its shadow behind.

It’s your road and yours alone. Others may walk it with you, but no one can walk it for you.

The greatest of wealth is the richness of the soul.

It is man that makes truth great, not truth that makes man great.