"Because psychologists have been able to discover, exactly as in a slow-motion picture, the way the human creature acquires knowledge and habits, the normal child has been vastly helped by what the retarded have taught us."

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If a man of good natural disposition acquires Intelligence [as a whole], then he excels in conduct, and the disposition which previously only resembled Virtue, will now be Virtue in the true sense. Hence just as with the faculty of forming opinions [the calculative faculty] there are two qualities, Cleverness and Prudence, so also in the moral part of the soul there are two qualities, natural virtue and true Virtue; and true Virtue cannot exist without Prudence.

— Aristotle