You can be a thorough-going Neo-Darwinian without imagination, metaphysics, poetry, conscience, or decency. For 'Natural Selection' has no moral significance: it deals with that part of evolution which has no purpose, no intelligence, and might more appropriately be called accidental selection, or better still, Unnatural Selection, since nothing is more unnatural than an accident. If it could be proved that the whole universe had been produced by such Selection, only fools and rascals could bear to live.
This is the true joy of life-the being used for a purpose recognized by yourself as a mighty one, the being thoroughly worn out before you are thrown to the scrap-heap; the being a force of nature instead of a feverish, selfish clod of ailments and grievances.
I was taught when I was young that if people would only love one another, all would be well with the world. I found when I tried to put that into practice, not only were other people seldom lovable but I wasn't very lovable myself.
The medieval doctors of divinity who did not pretend to settle how many angels could dance on the point of a needle cut a very poor figure as far as romantic credulity is concerned beside the modern physicists who have settled to the billionth of a millimetre every movement and position in the dance of the electrons. Not for worlds would I question the precise accuracy of these calculations or the existence of electrons (whatever they may be). The fate of Joan is a warning to me against such heresy.