systems, it is plain, are formed by the instrumentality of laws and those are good which are formed by that of good laws: whether they are written or unwritten, 1180b whether they are applied to the training of one or many, will not, it seems, make any difference, just as it does not in music, gymnastics, or any other such accomplishments, which are gained by practice.
For just as in Communities laws and customs prevail, so too in families the express commands of the Head, and customs also: and even more in the latter, because of blood-relationship and the benefits conferred: for there you have, to begin with, people who have affection and are naturally obedient to the authority which controls them.
Then, furthermore, Private training has advantages over Public, as in the case of the healing art: for instance, as a general rule, a man who is in a fever should keep quiet, and starve; but in a particular case, perhaps, this may not hold good; or, to take a different illustration, the boxer will not use the same way of fighting with all antagonists.
It would seem then that the individual will be most exactly attended to under Private care, because so each will be more likely to obtain what is expedient for him. Of course, whether in the art of healing, or gymnastics, or any other, a man will treat individual cases the better for being acquainted with general rules; as, "that so and so is good for all, or for men in such and such cases:" because general maxims are not only said to be but are the object-matter of sciences: still this is no reason against the possibility of a man's taking excellent care of some one case, though he possesses no scientific knowledge but from experience is exactly acquainted with what happens in each point; just as some people are thought to doctor themselves best though they would be wholly unable to administer relief to others. Yet it may seem to be necessary nevertheless, for one who wishes to become a real artist and well acquainted with the theory of his profession, to have recourse to general principles
