More quotes by Friedrich Nietzsche

"The snake which cannot cast its skin has to die. As well the minds which are prevented from changing their opinions; they cease to be mind."
"Sleeping is no mean art: for its sake one must stay awake all day."
"Sometimes people don't want to hear the truth because they don't want their illusions destroyed."
"A thinker sees his own actions as experiments and questions--as attempts to find out something. Success and failure are for him answers above all."
"That which does not kill us makes us stronger."