Pleasure and the limits of desire › Prudence, virtue, and other people

The letter gives prudence, or practical wisdom, a central place. It is the capacity to reason about what to choose and avoid. Epicurus links living pleasantly with living prudently, honorably, and justly; he treats these ways of living as inseparable. His ethics therefore demands more than skill at arranging private gratifications. Letter, 132.

That connection needs an argument. A critic can ask whether a successful wrongdoer might lead a consistently pleasant life without punishment, regret, or fear of discovery. Epicurus's insistence that justice and pleasant living belong together faces the challenge of explaining why such a life is impossible or unstable. Principal Doctrine 35 addresses a related issue: a person who secretly violates agreements against mutual harm cannot be confident of remaining undetected. This gives a reason against injustice grounded in insecurity, though a critic can question whether it explains everything wrong with harming another person.

Friendship makes the account less solitary. Principal Doctrine 27 places friendship foremost among what wisdom provides for a happy life. This is evidence from the wider Epicurean teaching; the letter itself closes with a recommendation to practice its lessons with a like-minded person. We should keep those sources distinct rather than pretend the letter contains an extensive theory of friendship. Principal Doctrines, 27, 35.

For a modern reader, the practical issue is how a life is sustained with others. A friendship is not well described by counting only the immediately pleasant moments it provides. It can involve inconvenience and painful honesty. Within the letter's reasoning about consequences, accepting those costs can make sense. Whether concern for a friend has a value independent of its contribution to one's own pleasure remains a further philosophical question.