In Moral Essays, Seneca expresses his Stoic philosophy on providence, steadfastness, anger, forgiveness, consolation, the happy life, leisure, tranquility, the brevity of life, and gift-giving.

Seneca's Stoic philosophy is captured in his "Moral Essays." On Providence (which tries to answer the question: why, if god is omnipotent, do good people suffer), On Constancy (on Stoic self-sufficiency), On Anger, and On Clemency (addressed to the emperor Nero) are included in the first of this three-volume edition.