"The man of knowledge must be able not only to love his enemies but also to hate his friends."

"Thou goest to women? Do not forget thy whip!"

"Christianity is a revolt of all creatures that crawl on the ground against everything that is lofty."

"One should not talk much about oneself, when one has done nothing."

"The secret of realizing the greatest fruitfulness and the greatest enjoyment of existence is to live dangerously!"