We do not have to visit a madhouse to find disordered minds; our planet is the mental institution of the universe.

Originality provokes originality.

One must keep repeating the Truth.

Everyone holds his fortune in his own hands, like a sculptor the raw material he will fashion into a figure. But it's the same with that type of artistic activity as with all others: We are merely born with the capability to do it. The Skill to mold the material into what we want must be learned and attentively cultivated.

Hypotheses are the scaffolds which are erected in front of a building and removedd when the building is completed. They are indispensable to the worker; but the worker must not mistake the scaffolding for the building.

To know of someone here and there whom we accord with, who is living on with us, even in silence - - this makes our earthly ball a peopled garden.

An angel! Nonsense! Everybody so describes his mistress; and yet I find it impossible to tell you how perfect she is, or why she is so perfect: suffice it to say she has captivated all my senses.