Thirdly, Plato taught that after death an unerring judgment and compensation await all souls. Every soul bears in itself the plain evidence of its quality and deeds, its vices and virtues; and in the unseen state it will meet inevitable awards on its merits. "To go to Hades with a soul full of crimes is the worst of all evils."23 "When a man dies, he possesses in the other world a destiny suited to the life which he has led in this."24 In the second book of the Republic he says, "We shall in Hades suffer the punishment of our misdeeds here;" and he argues at much length the absolute impossibility of in any way escaping this. The fact of a full reward for all wisdom and justice, a full retribution for all folly and vice, is asserted unequivocally in scores of passages, most of them expressly connecting the former with the notion of an ascent to the bright region of truth and intellect, the latter with a descent to the black penal realm of Hades. Let the citation of a single further example suffice. "Some souls, being sentenced, go to places of punishment beneath the earth; others are borne upward to some region in heaven."25 He proves the genuineness of his faith in this doctrine by continually urging it, in the most earnest, unaffected manner, as an animating motive in the formation of character and the conduct of life, saying, "He who neglects his soul will pass lamely through existence, and again pass into Hades, aimless and unserviceable."26 The fourth and last step in this exposition is to show the particular form in which Plato held his doctrine of future retribution, the way in which he supposed the consequences of present good and evil would appear hereafter. He received the Oriental theory of transmigration. Souls are born over and over. The banishment of the wicked to Tartarus is provisional, a preparation for their return to incarnate life. The residence of the good in heaven is contingent, and will be lost the moment they yield to carelessness or material solicitations. The circumstances under which they are reborn, the happiness or misery of their renewed existence, depend on their character and conduct in their previous career; and thus a poetic justice is secured. At the close of the Timaus, Plato describes the whole animal kingdom as consisting of degraded human souls, from "the tribe of birds, which were light minded souls, to the tribe of oysters, which have received the most remote habitations as a punishment of their extreme ignorance." "After this manner, then, both formerly and 22 Statesman, 14, 15. 23 Gorgias, 165. 24 Republic, lib. vi. cap. i. 25 Phadrus, 61. 26 Timaus, 18.