Plato agreed with Socrates in teaching that to know the good is necessarily to seek it. He accordingly makes wisdom the first of the virtues, by wisdom meaning insight, the clear recognition of what constitutes the highest good. Issuing from this primary virtue of wisdom, like a stream from a fountain, are the virtues of courage, temperance, and justice. From wisdom comes courage, for perfect knowledge of good and evil casts out fear; and moderation, for knowledge of higher and lower, of the penalty that awaits all excess, leads to prudence and self-control; and justice, for knowledge of one’s relations to one’s fellows creates consideration for the rights of others. Plato here simply systematizes and reduces to scientific form those various virtues which the common Greek conscience recognized as constituting moral excellence. Particularly noteworthy is Plato’s doctrine that virtue in the state is the same as virtue in the individual. There is need of emphasis being laid anew upon this teaching at the present time, when the disciples of Machiavelli would give fresh vogue to the doctrine of a double standard of morality, one for the individual and another for the state. The modern world might well sit at Plato’s feet and learn that virtue is ever one and the same, and that the moral law can no more be traversed with impunity by a nation than by a single individual. In many of his ethical teachings Plato anticipated and deeply influenced Christian doctrines. He has been called the precursor of the Fathers of the Church. “His ideas on virtue,” as Denis observes, “take us far from Greece and antiquity; they seem addressed rather to the saints and anchorites than to the citizens of Sparta and Athens.”[502] His doctrines that the way of approach to God is through contemplation; that withdrawal from the turmoil of public life is a furtherance of the true life; that the body is a “prison house” of the soul; that the soul is immortal and that there awaits it in the after life recompense for deeds done in the flesh; that expiation for sin is an ethical necessity; that punishment is not a deterrent and restraint but a remedy that restores to health the sin-diseased soul[503]--all these ideas and principles were in exact accord with the Christian moral consciousness, and through St. Augustine and other Fathers of the Church came to enrich and reënforce the ethical system of the monastic and the papal Church of the medieval age. Perhaps what is the most admirable of Plato’s teachings is embodied in this petition: “And may I, being of sound mind, do to others as I would that they should do to me.”[504] The significance of this lies in the fact that it is a prayer, and that the petitioner asks that he may be of sound mind when he reflects on what he would like to have others do to him.