Manhood and sagacity ripen of themselves; it suffices not to repress or distort them.

Fanaticism consists of redoubling your effort when you have forgotten your aim.

For an idea ever to be fashionable is ominous, since it must afterwards be always old fashioned

Nietzsche said that the earth has been a madhouse long enough. Without contradicting him we might perhaps soften the expression, and say that philosophy has been long enough an asylum for enthusiasts.

Reason in my philosophy is only a harmony among irrational impulses.

The word experience is like a shrapnel shell, and bursts into a thousand meanings.

I believe in the possibility of happiness, if one cultivates intuition and outlives the grosser passions, including optimism.