Truth will have no gods before it.- The belief in truth begins with the doubt of all truths in which one has previously believed.

Today as always, men fall into two groups: slaves and free men. Whoever does not have two-thirds of his day for himself, is a slave, whatever he may be: a statesman, a businessman, an official, or a scholar.

Jealous is every virtue of the others, and a dreadful thing is jealousy. Even virtues may succumb by jealousy.

The grand style follows suit with all great passion. It disdains to please, it forgets to persuade. It commands. It wills.

The strongest and most evil spirits have to date advanced mankind the most: they always rekindled the sleeping passions - all orderly arranged society lulls the passions to sleep; they always reawakened the sense of comparison, of contradiction, of delight in the new, the adventurous, the untried; they compelled men to set opinion against opinion, ideal plan against ideal plan.

Every deep thinker is more afraid of being understood than of being misunderstood.

The world was conquered through the understanding of dogs; the world exists through the understanding of dogs.