Misery is a match that never goes out.

The chess-board is the world, the pieces are the phenomena of the universe, the rules of the game are what we call the laws of Nature. The player on the other side is hidden from us.

If there is anything in the world which I do firmly believe in, it is the universal validity of the law of causation.

No slavery can be abolished without a double emancipation, and the master will benefit by freedom more than the freed-man.

The only people, scientific or other, who never make mistakes are those who do nothing.

Though under-instruction is a bad thing, it is not impossible that over-instruction may be worse.

It is better to read a little and thoroughly than cram a crude undigested mass into my head, though it be great in quantity.