To call the world God is not to explain it; it is only to enrich our language with a superfluous synonym.

Every nation ridicules other nations, and all are right.

The brain may be regarded as a kind of parasite of the organism, a pensioner, as it were, who dwells with the body.

A book can never be anything more than the impression of its author’s thoughts. The value of these thoughts lies either in the matter about which he has thought, or in the form in which he develops his matter — that is to say, what he has thought about it.

He who writes carelessly confesses thereby at the very outset that he does not attach much importance to his own thoughts.

Just as the largest library, badly arranged, is not so useful as a very moderate one that is well arranged, so the greatest amount of knowledge, if not elaborated by our own thoughts, is worth much less than a far smaller volume that has been abundantly and repeatedly thought over.

Unrest is the mark of existence.