46
" Many textbooks point out that no animal has evolved wheels and cite the fact as an example of how evolution is often incapable of finding the optimal solution to an engineering problem. But it is not a good example at all. Even if nature could have evolved a moose on wheels, it surely would have opted not to. Wheels are good only in a world with roads and rails. They bog down in any terrain that is soft, slippery, steep, or uneven. Legs are better. Wheels have to roll along an unbroken supporting ridge, but legs can be placed on a series of separate footholds, an extreme example being a ladder. Legs can also be placed to minimize lurching and to step over obstacles. Even today, when it seems as if the world has become a parking lot, only about half of the earth's land is accessible to vehicles with wheels or tracks, but most of the earth's land is accessible to vehicles with feet: animals, the vehicles designed by natural selection. "
― Steven Pinker , How the Mind Works
60
" In the outworks of our lives, we were almost strangers, but we shared a certain outlook on human life and human destiny, which, from the very first, made a bond of extreme strength . . . . At our very first meeting, we talked with continually increasing intimacy. We seemed to sink through layer after layer of what was superficial, till gradually both reached the central fire. It was an experience unlike any other that I have known. We looked into each other's eyes, half appalled and half intoxicated to find ourselves together in such a region. The emotion was as intense as passionate love, and at the same time all-embracing. I came away bewildered, and hardly able to find my way among ordinary affairs. "
― Bertrand Russell , Portraits From Memory and Other Essays