Letter 79 — On the Rewards of Scientific Discovery (§9)

“Things which have reached their full stature cannot grow higher. Men who have attained wisdom will therefore be equal and on the same footing. Each of them will possess his own peculiar gifts: one will be more affable, another more facile, another more ready of speech, a fourth more eloquent; but as regards the quality under discussion,—the element that produces happiness,—it is equal in them all.”