The treatise examines what constitutes the human good and identifies happiness as the highest end of practical life, arguing that it is achieved through exercise of virtue. It distinguishes moral virtues, formed by habituation and guided by the doctrine of the mean, from intellectual virtues developed by instruction and deliberation. Topics include practical reasoning, justice, friendship, pleasure, and the role of law and political community in cultivating character. The final section argues that contemplative activity represents the most self-sufficient form of happiness while framing moral education as central to individual and civic flourishing.