With respect to the amity, however, which subsists in all things towards all, Pythagoras delivered it in the clearest manner. And, the amity of the Gods indeed towards men, he unfolded through piety and scientific cultivation; but that of dogmas towards each other, and universally of the soul towards the body, and of the rational towards the species of the irrational part, through philosophy, and the theory pertaining to it. With respect to the amity of men also towards each other; that of citizens he delivered through sane legislation, but that of strangers through a correct physiology; and that between man and wife, or children, or brothers, and kindred, through unperverted communion. In short, he unfolded the friendship of all things towards all, and still farther, of certain irrational animals, through justice and a physical connexion and association. But the pacification and conciliation of the body, which is of itself mortal, and of its latent contrary powers, he unfolded through health, and a diet and temperance conformable to this, in imitation of the salubrious condition of the mundane elements. In all these, however, Pythagoras is acknowledged to have been the inventor and legislator of the summary comprehension of them in one and the same name, which is that of friendship. And indeed he delivered such an admirable friendship to his associates, that even now those who are benevolent in the extreme towards each other, are said to belong to the Pythagoreans. It is necessary therefore to narrate the discipline of Pythagoras respecting these things, and the precepts which he used towards his disciples.

Pythagoras taught that friendship was the truest and nearest perfect of all relationships. He declared that in Nature there was a friendship of all...