Plato plainly calls us brethren, as being of one God and one teacher, in the following words: “For ye who are in the state are entirely brethren (as we shall say to them, continuing our story). But the God who formed you, mixed gold in the composition of these of you who are fit to rule, at your birth, wherefore you are most highly honoured; and silver in the case of those who are helpers; and steel and brass in the case of farmers and other workers.” Whence, of necessity, some embrace and love those things to which knowledge pertains; and others matters of opinion. Perchance he prophesies of that elect nature which is bent on knowledge; if by the supposition he makes of three natures he does not describe three polities, as some supposed: that of the Jews, the silver; that of the Greeks, the third; and that of the Christians, with whom has been mingled the regal gold, the Holy Spirit, the golden.