There's a peril in translating the Greek word that is often used by Aristotle and the other Virtue Ethicists -- eudaimonia -- into happiness. Happiness in English often maps to a transient & discrete emotional state, whereas eudaimonia is a much more expansive conception of flourishing and fulfillment that is not as simply as "feeling" happy or joyful all the time. Indeed, in virtue ethics, it is sometimes possible to endure hardship and feel quite negative emotions while experience eudaimonia (at least in the Stoic version of this branch of philosophy).