Sizzling Saturn, we’ve got a lunatic robot on our hands. - Isaac Asimov

Jamais poderá haver um homem tão perdido como aquele que está perdido nos vastos e intricados corredores de sua própria mente solitária, onde ninguém pode alcançá-lo e ninguém pode salvá-lo. Nunca houve um homem tão desamparado quanto aquele que não consegue lembrar.

The individual human being is unpredictable, but the reactions of human mobs, Seldon found, could be treated statistically. The larger the mob, the greater the accuracy that could be achieved. And the size of the human masses that Seldon worked with was no less than the population of the Galaxy, which in his time was numbered in the quintillions.

Psychology is a great science, but – there are no psychologists among us at the moment, I believe. It seems to me we're on uncertain ground.' Fara turned to Hardin. 'Didn't you study psychology under Alurin?' Hardin answered, half in reverie: 'Yes, I never completed my studies, though. I got tired of theory. I wanted to be a psychological engineer, but we lacked the facilities, so I did the next best thing – I went into politics. It's practically the same thing.