I'm forty-nine, not fifteen, and I've made my peace with myself. Had I been handsome and stupid when I was fifteen, or twenty-one, as, at that time i… - Isaac Asimov

Somewhere in the plant (Baley had no idea exactly where) a pound of fissionable material was consumed each day. Every so often, the radioactive fission products, the so-called "hot ash," were forced by air pressure through leaden pipes to distant caverns ten miles out in the ocean and a half mile below the ocean floor.

Pode-se aceitar a morte racionalmente, com todos os aspectos da mente consciente, mas o corpo era uma fera brutal, que não sabia nada sobre a razão.

Asimov: I don't know of any science fiction writer who really attempts to be a prophet. Such authors accomplish their tasks not by being correct in their predictions, necessarily, but merely by hammering home—in story after story—the notion that life is going to be different.