To fear love is to fear life, and those who fear life are already three parts dead.
Why is propaganda so much more successful when it stirs up hatred than when it tries to stir up friendly feeling?
Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.
The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as poetry.
Leibniz was one of the supreme intellects of all time.
Mathematics possesses not only truth, but Supreme beauty – a beauty cold and austere, like that of a sculpture.
Whatever may be the truth about the universe, it is bound to be astonishing.
I think we ought always to entertain our opinions with some measure of doubt. I shouldn’t wish people dogmatically to believe any philosophy, not even mine.
A stupid man’s report of what a clever man says can never be accurate, because he unconsciously translates what he hears into something he can understand.
Civilized life has altogether grown too tame, and, if it is to be stable, it must provide a harmless outlets for the impulses which our remote ancestors satisfied in hunting.