In our ideals we unwittingly reveal our vices.

Stupidity, outrage, vanity, cruelty, iniquity, bad faith, falsehood - we fail to see the whole array when it is facing in the same direction as we.

It is sometimes important for science to know how to forget the things she is surest of.

Think? Why think! We have computers to do that for us.

One kills a man, one is an assassin; one kills millions, one is a conqueror; one kills everybody, one is a god.

When I was young I pitied the old. Now old, it is the young I pity.

Falsity cannot keep an idea from being beautiful; there are certain errors of such ingenuity that one could regret their not ranking among the achievements of the human mind.