Every achievement, every step forward in knowledge, is the consequence of courage, of toughness towards oneself, of sincerity to oneself

A book calls for pen, ink, and a writing desk; today the rule is that pen, ink, and a writing desk call for a book.

To become the founder of a new religion one must be psychologically infallible in one's knowledge of a certain average type of souls who have not yet recognized that they belong together.

Whoever despises himself nonetheless respects himself as one who despises.

A man unconsciously imagines that where he is strong, where he feels most thoroughly alive, the element of his freedom must lie.

Man alone suffers so excruciatingly in the world that he was compelled to invent laughter.

A philosophical mythology lies concealed in language, which breaks out again at every moment, no matter how cautious we may be.