The division between human and robot is perhaps not as significant as that between intelligence and nonintelligence. - Isaac Asimov

Advertisement! A device for forcing the unwilling into line. Did it matter to a ground vehicle manufacturer whether a given individual felt an original or spontaneous desire for his product? If the prospect (that was the word) could be artificially persuaded or cajoled into feeling that desire and acting upon it, would that not be just as well?

Trantor was a world in dregs and rebirth. Set like a faded jewel in the midst of the bewildering crowd of suns at the center of the Galaxy — in the heaps and clusters of stars piled high with aimless prodigality — it alternately dreamed of past and future.

A wall is happy when it is well designed, when it rests firmly on its foundation, when its symmetry balances its part and produces no unpleasant stresses. Good design can be worked out on the mathematical principles of mechanics.