 Aristotle frequently emphasizes the importance of pleasure to human life and therefore to his study of how we should live (see for example 1099a7–20 and 1104b3–1105a16), but his full-scale examination of the nature and value of pleasure is found in two places: VII.11–14 and X.1–5. It is odd that pleasure receives two lengthy treatments; no other topic in the Ethics is revisited in this way. Book VII of the Nicomachean Ethics is identical to Book VI of the Eudemian Ethics; for unknown reasons, the editor of the former decided to include within it both the treatment of pleasure that is unique to that work (X.1–5) and the study that is common to both treatises (VII.11–14). The two accounts are broadly similar. They agree about the value of pleasure, defend a theory about its nature, and oppose competing theories. Aristotle holds that a happy life must include pleasure, and he therefore opposes those who argue that pleasure is by its nature bad. He insists that there are other pleasures besides those of the senses, and that the best pleasures are the ones experienced by virtuous people who have sufficient resources for excellent activity.