Letter 59 — On Pleasure and Joy (§16)

“Reflect, therefore, on this, that the effect of wisdom is a joy that is unbroken and continuous. The mind of the wise man is like the ultra-lunar firmament; eternal calm pervades that region. You have, then, a reason for wishing to be wise, if the wise man is never deprived of joy. This joy springs only from the knowledge that you possess the virtues. None but the brave, the just, the self-restrained, can rejoice.”