My conception of Eudaimonia. Sound in body, sound in mind, sound in spirit.
Eudaimonia is a Greek word which can be translated as human flourishing.
Let’s start with Plato and Aristotle.
The Definitions, a dictionary of Greek philosophical terms attributed to Plato himself but believed by modern scholars to have been written by his immediate followers in the Academy, provides the following definition of the word eudaimonia: “The good composed of all goods; an ability which suffices for living well; perfection in respect of virtue; resources sufficient for a living creature.”
In his Nicomachean Ethics (§21; 1095a15–22), Aristotle says that everyone agrees that eudaimonia is the highest good for human beings, but that there is substantial disagreement on what sort of life counts as doing and living well; i.e. eudaimon:
Verbally there is a very general agreement; for both the general run of men and people of superior refinement say that it is [eudaimonia], and identify living well and faring well with being happy; but with regard to what [eudaimonia] is they differ, and the many do not give the same account as the wise. For the former think it is some plain and obvious thing like pleasure, wealth or honour… [1095a17]
So, as Aristotle points out, saying that eudaimon life is a life which is objectively desirable, and means living well, is not saying very much. Everyone wants to be eudaimon; and everyone agrees that being eudaimon is related to faring well and to an individual’s well being. The really difficult question is to specify just what sort of activities enable one to live well. Aristotle presents various popular conceptions of the best life for human beings. The candidates that he mentions are a (1) life of pleasure, (2) a life of political activity and (3) a philosophical life.
One important move in Greek philosophy to answer the question of how to achieve eudaimonia is to bring in another important concept in ancient philosophy, “arete” (“virtue”). Aristotle says that the eudaimon life is one of “virtuous activity in accordance with reason” [1097b22–1098a20]. And even Epicurus who argues that the eudaimon life is the life of pleasure maintains that the life of pleasure coincides with the life of virtue. So the ancient ethical theorists tend to agree that virtue is closely bound up with happiness (areté is bound up with eudaimonia). However, they disagree on the way in which this is so. We shall consider the main theories in a moment, but first a warning about the proper translation of areté.