Since happiness is an activity of soul in accordance with perfect virtue, we must consider the nature of virtue; for perhaps we shall thus see better the nature of happiness.
(5) Zoriontasuna bertute betearen araberako arimaren jarduera jakin bat denez, bertuteari buruz ikertu beharko dugu, horrela zoriontasunari dagokiona ere agian hobeto argituko baitugu.