it would be harmful to humanity to have the explanation known, and that's why we can only guess - Isaac Asimov

Baley tried to picture a world as a sphere being lit and unlit as it turned. He found it hard to do and felt scornful of the so-superior Spacers who let such an essential thing as time be dictated to them by the vagaries of planetary movements.

It does not actually take much to rouse resentment and latent fear of women in any man. It may be a biological matter that I, as a robot, cannot fully understand.

For it is the chief characteristic of the religion of science, that it works, and that such curses as that of Aporat's are really deadly.