When a man does not write his poetry, it escapes by other vents through him.

If I cannot brag of knowing something, then I brag of not knowing it; at any rate, brag.

The astronomers said, 'Give us matter and a little motion and we will construct the universe. It is not enough that we should have matter, we must also have a single impulse, one shove to launch the mass and generate the harmony of the centrifugal and centripetal forces.' ... There is no end to the consequences of the act. That famous aboriginal push propagates itself through all the balls of the system, and through every atom of every ball.

The great will not condescend to take anything seriously.

The other terror that scares us from self-trust is our consistency; a reverence for our past act or word, because the eyes of others have no other data for computing our orbit than our past acts, and we are loath to disappoint them.

God will not have his work made manifest by cowards. Always, always, always, always, always do what you are afraid to do. Do the thing you fear and the death of fear is certain.

When it's dark enough men see stars.