HISTORY OF PHILOSOPHY

«…and when they have reached fifty years of age, then let those who still survive and have distinguished themselves in every action of their lives, and in every branch of knowledge, come at last to their consummation : the time has now arrived at which they must raise the eye of the soul to the universal light which lightens all things, and behold the absolute good ; for that is the pattern according to which they are to order the State and the lives of individuals, and the remainder of their own lives also ; making philosophy their chief pursuit, but, when their turn comes, toiling also at politics and ruling for the public good, not as though they were performing some heroic action, but simply as a matter of duty ; and when they have brought up in each generation others like themselves and left them in their place to be governors of the State, then they will depart to the Islands of the Blessed and dwell there ; and the city will give them public memorials and sacrifices and honor them, if the Pythian oracle consent, as demigods, but if not, as in any case blessed and divine.»

Plato, The Republic, book VII, 540 a2- c3
(translated by Benjamin Jowett)