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.

No one can cheat you out of ultimate success but yourself.

Every sweet has its sour; every evil its good.

The secret of education lies in respecting the pupil. It is not for you to choose what he shall know, what he shall do. It is chosen and foreordained and he only holds the key to his own secret.

Moderation in all things, especially moderation.

We cannot let our angels go; we do not see that they only go out that archangels may come in.

The stupidity of men always invites the insolence of power.