One mind is enough for a thousand hands.

It is in self-limitation that a master first shows himself.

Let there be truth between us.

Do thine own task, and be therewith content.

When the healthy nature of man acts as a whole, when he feels himself to be in the world as in a great, beautiful, noble, and valued whole, when harmonious ease affords him a pure and free delight, then the universe, if it could experience itself, would exult, as having attained its goal, and admire the climax of its own becoming and essence.

A mathematician is only perfect insofar as he is a perfect man, sensitive to the beauty of truth.

Life belongs to the living, and he who lives must be prepared for changes.