“Nothing on earth consumes a man more quickly than the passion of resentment.”

“We are, all of us, growing volcanoes that approach the hour of their eruption, but how near or distant that is, nobody knows- not even God.”

“I assess the power of a will by how much resistance, pain, torture it endures and knows how to turn to its advantage”

“Perhaps I am even envious of Stendhal? He robbed me of the best atheist joke which precisely I could have made: 'God's only excuse is that he does not exist'...I myself have said somewhere: what hitherto been the greatest objection to existence? God...”

“de omnibus dubitandum”

“Willing emancipates: for willing is creating: so do I teach. And only for creating shall you learn!”

“What destroys a man more quickly than to work, think and feel without inner necessity, without any deep personal desire, without pleasure - as a mere automaton of duty?”