The Republic by Plato Part 5 Page 60

to be happy in such a manner that he will cease to be a guardian, and is not content with this safe and harmonious life, which, in our judgment, is of all lives the best, but infatuated by some youthful conceit of happiness which gets up into his head shall seek to appropriate the whole state to himself, then he will have to learn how wisely Hesiod spoke, when he said, ‘half is more than the whole.’

If he were to consult me, I should say to him: Stay where you are, when you have the offer of such a life.

You agree then, I said, that men and women are to have a common way of life such as we have described — common education, common children; and they are to watch over the citizens in common whether abiding in the city or going out to war; they are to keep watch together,