What limit would you propose? I would allow the State to increase so far as is consistent with unity; that, I think, is the proper limit. Very good, he said. Here then, I said, is another order which will have to be conveyed to our guardians: Let our city be accounted neither large nor small, but one and self-sufficing. And surely, said he, this is not a very severe order which we impose upon them. And the other, said I, of which we were speaking before is lighter still, I mean the duty of degrading the offspring of the guardians when inferior, and of elevating into the rank of guardians the offspring of the lower classes, when naturally superior. The intention was, that, in the case of the citizens generally, each individual should be put to the use for which nature which nature intended him, one to one work, and then every man would do his own business, and be one and not many; and so the whole city would be one and not many. Yes, he said; that is not so difficult. The regulations which we are prescribing, my good Adeimantus, are not, as might be supposed, a number of great principles, but trifles all, if care be taken, as the saying is, of the one great thing,--a thing, however, which I would rather call, not great, but sufficient for our purpose. What may that be? he asked. Education, I said, and nurture: If our citizens are well educated, and grow into sensible men, they will easily see their way through all these, as well as other matters which I omit; such, for example, as marriage, the possession of women and the procreation of children, which will all follow the general principle that friends have all things in common, as the proverb says. That will be the best way of settling them. Also, I said, the State, if once started well, moves with accumulating force like a wheel. For good nurture and education implant good constitutions, and these good constitutions taking root in a good education improve more and more, and this improvement affects the breed in man as in other animals. Very possibly, he said. Then to sum up: This is the point to which, above all, the attention of our rulers should be directed,--that music and gymnastic be preserved in their original form, and no innovation made. They must do their utmost to maintain them intact. And when any one says that mankind most regard The newest song which the singers have, they will be afraid that he may be praising, not new songs, but a new kind of song; and this ought not to be praised, or conceived to be the meaning of the poet; for any musical innovation is full of danger to the whole State, and ought to be prohibited. So Damon tells me, and I can quite believe him;-he says that when modes of music change, of the State always change with them. Yes, said Adeimantus; and you may add my suffrage to Damon's and your own. Then, I said, our guardians must lay the foundations of their fortress in music?