According to Aristotle, virtue primarily involves rationality and the use of a person's rationality. Rationality and happiness are activities of the soul, and virtue is the excellence of these activities. Humans are the only life forms that have a soul, the source of rationality. Thus, humans have a duty to always use their intellect.
Emotions are things humans feel, like anguish or happiness that are followed by pain or pleasure.
Capacities are a person s ability or capacity to experience or express something. Since people are not considered good or bad based on their emotions, virtue cannot be an emotion. Virtue is not a capacity either, because virtue involves choice, not abilities. In other words, a person with a good character has virtue. The aim of all human action is for good, and any virtuous act is good.