And he who must be a creator in good and evil: verily, he must be an annihilator first and demolish values.

Do you believe then that the sciences would ever have arisen and become great if there had not before hand been magicians, alchemists, astrologers and wizards, who thirsted and hungered after abscondite and forbidden powers?

In almost all sciences the fundamental knowledge is either found in earliest times or is still being sought.

Never trust a thought that didn't come by walking.

We should consider every day lost on which we have not danced at least once.

Every achievement, every step forward in knowledge, is the consequence of courage, of toughness towards oneself, of sincerity to oneself

A married philosopher is a comic character.