What a fine comedy this world would be if one did not play a part in it.

Scepticism is the first step toward truth.

The following general definition of an animal: a system of different organic molecules that have combined with one another, under the impulsion of a sensation similar to an obtuse and muffled sense of touch given to them by the creator of matter as a whole, until each one of them has found the most suitable position for its shape and comfort.

The enjoyment of freedom which could be exercised without any motivation would be the real hallmark of a maniac.

One must be oneself very little of a philosopher not to feel that the finest privilege of our reason consists in not believing in anything by the impulsion of a blind and mechanical instinct, and that it is to dishonour reason to put it in bonds as the Chaldeans did. Man is born to think for himself.

You can be sure that a painter reveals himself in his work as much as and more than a writer does in his.

Only God and some few rare geniuses can keep forging ahead into novelty.