Natural selection acts solely by accumulating slight successive favorable variations, it can produce no great or sudden modification; it can act only by very short steps.
Great is the power of steady misrepresentation.
I am not the least afraid to die.
What a book a devil’s chaplain might write on the clumsy, wasteful, blundering, low, and horribly cruel work of nature!
Man tends to increase at a greater rate than his means of subsistence.
False facts are highly injurious to the progress of science, for they often endure long; but false views, if supported by some evidence, do little harm, for every one takes a salutary pleasure in proving their falseness.
I am turned into a sort of machine for observing facts and grinding out conclusions.
At some future period, not very distant as measured by centuries, the civilized races of man will almost certainly exterminate, and replace the savage races throughout the world.
A scientific man ought to have no wishes, no affections, – a mere heart of stone.
We will now discuss in a little more detail the Struggle for Existence.
He who understands baboons would do more towards metaphysics than Locke.
The question of whether there exists a Creator and Ruler of the Universe has been answered in the affirmative by some of the highest intellects that have ever existed.
We may confidently come to the conclusion, that the forces which slowly and by little starts uplift continents, and that those which at successive periods pour forth volcanic matter from open orifices, are identical.
What can be more curious than that the hand of a man, formed for grasping, that of a mole for digging, the leg of the horse, the paddle of the porpoise, and the wing of the bat, should all be constructed on the same pattern?
Daily it is forced home on the mind of the biologist that nothing, not even the wind that blows, is so unstable as the level of the crust of this earth.
Thomson’s views on the recent age of the world have been for some time one of my sorest troubles.
Disbelief crept over me at a very slow rate, but at last it was complete.
I shall always feel respect for every one who has written a book, let it be what it may, for I had no idea of the trouble which trying to write common English could cost one – And alas there yet remains the worst part of all correcting the press.
If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down. But I can find no such case.
A moral being is one who is capable of reflecting on his past actions and their motives – of approving of some and disapproving of others.
The evolution of the human race will not be accomplished in the ten thousand years of tame animals, but in the million years of wild animals, because man is, and always will be, a wild animal.