If any one gives too great a power to anything, too large a sail to a vessel, too much food to the body, too much authority to the mind, and does not observe the mean, everything is overthrown, and, in the wantonness of excess runs in the one case to disorders, and in the other to injustice, which is the child of excess. I mean to say, my dear friends, that there is no soul of man, young and irresponsible, who will be able to sustain the temptation of arbitrary power-no one who will not, under such circumstances, become filled with folly, that worst of diseases, and be hated by his nearest and dearest friends: when this happens, his kingdom is undermined, and all his power vanishes from him. And great legislators who know the mean should take heed of the danger.
Plato, Laws
