Thomas Huxley

If a man cannot do brain work without stimulants of any kind, he had better turn to hand work it is an indication on Nature’s part that she did not mean him to be a head worker.

Of moral purpose I see no trace in Nature. That is an article of exclusively human manufacture and very much to our credit.

Sit down before fact as a little child, be prepared to give up every conceived notion, follow humbly wherever and whatever abysses nature leads, or you will learn nothing.

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.