We should take care not to make the intellect our god; it has, of course, powerful muscles, but no personality.
All that is valuable in human society depends upon the opportunity for development accorded the individual.
The fear of death is the most unjustified of all fears, for there's no risk of accident for someone who's dead.
As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality.
Heroism on command, senseless violence, and all the loathsome nonsense that goes by the name of patriotism - how passionately I hate them!
That deep emotional conviction of the presence of a superior reasoning power, which is revealed in the incomprehensible universe, forms my idea of God.