This article explains the idea of justice as a virtue of the soul and as the supreme virtue in ethics, as opposed to justice as a mere social action. Individual justice takes precedence over social justice since, through training man, the society will naturally include trained individuals; as a result, society will have a healthy political structure. This is discussed in virtue ethics in which virtues are held to have inherent value. Virtue ethics also discusses the ethical characteristics and habits, emphasizing the intrinsic characteristics of the agent of the action. According to the individual justice, justice as a virtue guides us to living a proper life. This paper investigates, explains and compares the theories of Plato, Aristotle and Muslim philosophers including Khajeh Nasir-ul-Din Tusi, Ibn Miskawayh, and the late Naraqi.