عنوان مقاله [English]
The present article attempts to enumerate moral desires in Plato`s idea and seeks the rationality of those morals. Hence, as an introduction this article discusses Plato`s cosmology and self-knowledge and the explicates their relation and affiliation by virtue of rationality and desirability of the desire their hidden rationality and the purpose which has led Plato to such a conclusion furthermore. By drawing upon such introductory words, “moral virtue” is introduced as Plato`s wish and principal virtue are enumerated and set forth. These moral virtues encompass all the other virtues such as chastity, courage, wisdom and finally justice. Each of these virtues is deduced from Plato`s self-knowledge and the rationality of these desires has been discussed in light of word of ideas as Plato`s cosmology. Accordingly, it is concluded that word of ideas – the ultimate goodness which is the sauce of the word and all the goodness in it- is the perfect example of all virtues and attaining it brings about human Happiness. Therefore, happiness, the end point of moral action and the ultimate goodness is a result of that. And achieving those virtues is the passage to accomplish them.