He seemed so to Hari Seldon, certainly. Seldon stopped his morning constitutional to watch him. - Isaac Asimov

Pyscho-history dealt not with man, but with man-masses. It was the science of mobs; mobs in their billions. It could forecast reactions to stimuli with something of the accuracy that a lesser science could bring to the forecast of a rebound of a billiard ball. The reaction of one man could be forecast by no known mathematics; the reaction of a billion is something else again.

Baley said, sharply, "Nevertheless bound by friendship. Do not, for your own sake, test the force of our — " Now it was he who paused and, as though to his own surprise, completed the sentence impossibly, " — love.

The elderly man, flushed with pleasure, was recounting in voluble fashion his experiences and impressions. His wife joined in periodically, with meticulous corrections involving completely unimportant points; these being given and taken in the best of humor.