The belief in authority is the source of conscience; which is therefore not the voice of God in the heart of man, but the voice of some men in man.

To have to fight the instincts - that is the definition of decadence: as long as life is ascending, happiness equals instinct.

Wherever primitive man put up a word, he believed he had made a discovery. How utterly mistaken he really was! He had touched a problem, and while supposing he had solved it, he had created and obstacle to its solution. Now, with every new knowledge we stumble over flint-like and petrified words and, in so doing, break a leg sooner than a word.

To the mediocre, mediocrity is a form of happiness.

One hears but one does not seek; one takes -- one does not ask who gives; a thought flashes up like lightning, it comes of necessity and unfalteringly formed.

O sancta simplicitas! What strange simplification and falsification mankind lives on! One can never cease to marvel once one has acquired eyes for this marvel! How we have made everything around us bright and free and easy and simple! How we have known how to bestow on our senses a passport to everything superficial, on our thoughts a divine desire for wanton gambling and false conclusions! - how we have from the very beginning understood how to retain our ignorance so as to enjoy an almost inconceivable freedom, frivolity, impetuosity, bravery, cheerfulness of life, so as to enjoy life!

[Heraclitus] did not require humans or their sort of knowledge, since everything into which one may inquire he despises [as being] in contrast [to his own] inward-turning wisdom. [To him] all learning from others is a sign of nonwisdom, because the wise man focuses his vision on his own intelligence.