Forgetting: that is a divine capacity. And whoever aspires to the heights and wants to fly must cast off much that is heavy and make himself light--I call it a divine capacity for lightness.

People who have given us their complete confidence believe that they have a right to ours. The inference is false, a gift confers no rights.

Kindliness, friendliness, the courtesy of the heart, are ever-flowing streams of non egoistic impulses, and have given far more powerful assistance to culture than even those much more famous demonstrations which are called pity, mercy, and self-sacrifice.

Man is more ape than many of the apes.

We should conserve evil just as we should conserve the forests. It is true that by thinning and clearing the forests the earth grew warmer.

There is nothing we like to communicate to others as much as the seal of secrecy together with what lies under it.

No more fiction, for now we calculate; but that we may calculate, we had to make fiction first.