Eudaimonism is a philosophy that defines right action as that which leads to "well-being." The concept originates in Aristotle's Nicomachean Ethics. In Aristotle eudaimonism means that all correct actions lead to the greater well-being of the individual human. By extending well-being from the narrowest concerns to the largest, all social rules can be adduced. Augustine of Hippo adopted the concept as beatitudo, and Thomas Aquinas worked it out into a Christian ethical scheme. For Aquinas, well-being is found ultimately in a direct perception of God, or complete blessedness.