On Sobriety (22-25)

You observe here now that he never calls the son of the wife that is beloved the first born or the elder, but he often gives this title to the son of her who is hated; and yet he has already pointed out that the son of her who is beloved was in point of time the first, and the son of her who is hated the last, at the very beginning of this injunction; for he says, "If the beloved wife and she who is hated both bear children." But nevertheless the offspring of the first mentioned, even though it may be considerably earlier in point of time is looked upon as younger by right reason when it comes to decide between them. But the offspring of her who is spoken of in the second place, even though it may come after as to the time of its birth, is thought worthy of the more important and elder share. [*] [*]

Why so? because we say that she who is beloved is the symbol of pleasure, and she who is hated is the emblem of prudence. For the chief multitude of men love the company of the one to excess, inasmuch as she, from her own treasures, proffers them most seductive charms and allurements, from the very first moment of their birth to the extremity of old age; but of the other they detest excessively the austere and very dignified look, just as silly children dislike the profitable but unpleasant reproofs of their parents and guardians.

And both the wives become mothers: the one bringing forth that disposition in the soul which loves pleasure, and the other that which loves virtue; but the lover of pleasure is imperfect, and in reality is always a child, even if he reaches a vast age of many years. But, on the other hand, the lover of virtue, though he is in old age as to his wisdom, while still in his swaddling clothes, as the proverb has it, will never grow old.

In reference to which Moses says very emphatically with respect to the son of virtue, which is hated by the generality of men, that "he is the beginning of his children," being, forsooth, the first both in order and precedency. And to him belong the rights of the first-born by the law of nature, and not by the lawless principle existing among men.