'God himself cannot exist without wise men' - Luther said, and was right. But 'God can exist even less without unwise men' - that good old Luther did not say.

The growth of wisdom may be gauged exactly by the diminution of ill-temper.

Truly, it is a blessing and not a blasphemy when I teach that "above all things there stands the heaven of chance, the heaven of innocence, the heaven of accident, the heaven of wantonness".

The devotion of the greatest is to encounter risk and danger, and play dice for death.

Fanatics are picturesque, mankind would rather see gestures than listen to reasons.

One does not hate so long as one continues to rate low, but only when one has come to rate equal or higher.

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.