Aristotle, and W. Rhys Roberts. Rhetoric. Mineola, NY: Dover, 2004. Kindle Electronic Edition.
Book II, chapter 14
Aristotle has discussed the temperaments of the young and the old. He now observes that men in their prime are “free from the extremes of either” the young or the old (II.14 B 1390a). They tend to be confident rather than rash or timid. They trust where trust is due. Their judgment is reasoned and careful. “To put it generally, all the valuable qualities that youth and age divide between them are united in the prime of life, while all their excesses or defects are replaced by moderation and fitness” (II.14, B 1390a). Aristotle considers that men are in their prime bodily from age 30-35 and in their minds about ages 30-49.