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 kitchen clock is more convenient than sidereal time. We must use the popular category, as we do by the Linnæan classification, for convenience, and not as exact and final. Otherwise, we are presently confounded, when the best-settled traits of one race are claimed by some new ethnologist as precisely characteristic of the rival tribe.

A man is a hero, not because he is braver than anyone else, but because he is brave for 10 minutes longer.

Power is what they want, not candy-power to execute their design, power to give legs and feet, form and actuality to their thought; which, to a clear-sighted man, appears the end for which the universe exists, and all its resources might be well applied.

The foolish man wonders at the unusual, but the wise man at the usual.

It does not need that a poem should be long. Every word was once a poem.

We are imprisoned in life in the company of persons powerfully unlike us.