Philosophers are as jealous as women; each wants a monopoly of praise.

Repetition is the only form of permanence that Nature can achieve.

The constant demands of the heart and the belly can allow man only an incidental indulgence in the pleasures of the eye and the understanding.

Religion should be disentangled as much as possible from history and authority and metaphysics, and made to rest honestly on one's fine feelings, on one's indomitable optimism and trust in life.

What is false in the science of facts may be true in the science of values.

Heaven is to be at peace with things.

The diseases which destroy a man are no less natural than the instincts which preserve him.