The world was not created once and for all time for each of us individually. There are added to it in the course of our life things of which we have never had any suspicion.

We are less justified in saying that the thinking life of humanity is a miraculous perfectioning of animal and physical life than that it is an imperfection in the organization of spiritual life as rudimentary as the communal existence of protozoa in colonies.

Happiness is beneficial for the body, but it is grief that develops the powers of the mind.

We are ordinarily so indifferent to people that when we have invested one of them with the possibility of giving us joy, or suffering, it seems as if he must belong to some other universe, he is imbued with poetry.

We exist only by virtue of what we possess, we possess only what is really present to us, and many of our memories, our moods, our ideas sail away on a voyage of their own until they are lost to sight! Then we can no longer take them into account in the total which is our personality. But they know of secret paths by which to return to us.

A certain similarity exists, although the type evolves, between all the women we love, a similarity that is due to the fixity of our own temperament, which it is that chooses them, eliminating all those who would not be at once our opposite and our complement, fitted that is to say to gratify our senses and to wring our heart.

No man is a complete mystery except to himself.