In letter #90, Seneca examines the purpose of philosophy in life. He fuses his own Stoic philosophy with ideas on the art-of-living, the development of government, and the pursuit of wisdom.
“If they had made philosophic knowledge also a common attribute and we were all born wise, then wisdom would have forfeited its principal quality, which is that it is not fortuitous.
“The natural measure which limited desires by essential requirements has retreated; to desire a mere sufficiency is now a mark of boorishness and wretchedness.
“Wisdom turns to the incorporeal and scrutinizes truth and its manifestations and determines the modes for distinguishing ambiguities in life or speech, for in both the false is mingled with the true.
“Virtue is not Nature’s gift; to become good is an art.
“Virtue can occur only in a soul trained and taught and raised to its height by assiduous exercise.
*All excerpts have been taken from The Stoic Philosophy of Seneca: Essays and Letters, W.W. Norton.