Men are worthy and good three ways; by nature, by custom, by reason. In the first place, a man ought to be born a man, and not any other animal; that is to say, he ought to have both a body and soul; but it avails not to be only born [1332b] with some things, for custom makes great alterations; for there are some things in nature capable of alteration either way which are fixed by custom, either for the better or the worse. Now, other animals live chiefly a life of nature; and in very few things according to custom; but man lives according to reason also, which he alone is endowed with; wherefore he ought to make all these accord with each other; for if men followed reason, and were persuaded that it was best to obey her, they would act in many respects contrary to nature and custom. What men ought naturally to be, to make good members of a community, I have already determined; the rest of this discourse therefore shall be upon education; for some things are acquired by habit, others by hearing them.
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