The doctrine that all men are, in any sense, or have been, at any time, free and equal, is an utterly baseless fiction. - Thomas Henry Huxley

Every great advance in natural knowledge has involved the absolute rejection of authority.

The question of all questions for humanity, the problem which lies behind all others and is more interesting than any of them, is that the determination of man's place in Nature and his relation to the Cosmos.

Within the last half century, the labours of such men as Von Baer, Rathke, Reichert, Bischof, and Remak, have almost completely unravelled... the successive stages of development which... are now as well known to the embryologist as are the steps of the metamorphosis of the silk-worm moth to the school boy.