Moral education and development is a major part of virtue ethics. Moral development, at least in its early stages, relies on the availability of good role models. The virtuous agent acts as a role model and the student of virtue emulates his or her example. Initially this is a process of habituating oneself in right action. Aristotle advises us to perform just acts because this way we become just. The student of virtue must develop the right habits, so that he tends to perform virtuous acts. Virtue is not itself a habit. Habituation is merely an aid to the development of virtue, but true virtue requires choice, understanding, and knowledge. The virtuous agent doesn't act justly merely out of an unreflective response, but has come to recognize the value of virtue and why it is the appropriate response. Virtue is chosen knowingly for its own sake.