The Republic by Plato Part 3 Page 102

generation, he replied; there is no way of accomplishing this; but their sons may be made to believe in the tale, and their sons’ sons, and posterity after them.

I see the difficulty, I replied; yet the fostering of such a belief will make them care more for the city and for one another. Enough, however, of the fiction, which may now fly abroad upon the wings of rumour, while we arm our earth-born heroes, and lead them forth under the command of their rulers. Let them look round and select a spot whence they can best suppress insurrection, if any prove refractory within, and also defend themselves against enemies, who like wolves may come down on the fold from without; there let them encamp, and when they have encamped, let them sacrifice to the proper Gods and prepare their dwellings.