Mathematicians deal with large numbers sometimes, but never in their income. - Isaac Asimov

So it is only the combination of strong Emperor and strong general that can harm the Foundation; for a strong Emperor cannot be dethroned easily, and a strong general is forced to turn outwards, past the frontiers.

The trouble with you, Peter, is that when you think of a witness to a planetological statement, you think of planetologists. You divide up human beings into categories, and despise and dismiss most. A robot cannot do that. The First Law says, 'A robot may not injure a human being or, through inaction, allow a human being to come to harm.' Any human being. That is the essence of the robotic view of life. A robot makes no distinction. To a robot, all men are truly equal, and to a robopsychologist who must perforce deal with men at the robotic level, all men are truly equal, too.

Though only a robot, he had known the continuity and stability of family life; he had known warmth; he had known love.