Some one will say, If the writer of this history intended, in enumerating the gen- erations from Adam through his son Seth, to descend through them to Noah, in whose time the deluge occurred, and from him again to trace the connected
generations down to Abraham, with whom Matthew begins the pedigree of Christ the eternal King of the city of God, what did he intend by enumerating the generations from Cain, and to what terminus did he mean to trace them? We reply, To the deluge, by which the whole stock of the earthly city was de- stroyed, but repaired by the sons of Noah. For the earthly city and community of men who live after the flesh will never fail until the end of this world, of which our Lord says, “The children of this world generate, and are generated.” But the city of God, which sojourns in this world, is conducted by regeneration to the world to come, of which the children neither generate nor are generated. In this world generation is common to both cities; though even now the city of God has many thousand citizens who abstain from the act of generation; yet the other city also has some citizens who imitate these, though erroneously. For to that city belong also those who have erred from the faith, and intro- duced divers heresies; for they live according to man, not according to God. And the Indian gymnosophists, who are said to philosophize in the solitudes of India in a state of nudity, are its citizens; and they abstain from marriage. For continence is not a good thing, except when it is practised in the faith of the highest good, that is, God. Yet no one is found to have practised it before the deluge; for indeed even Enoch himself, the seventh from Adam, who is said to have been translated without dying, begat sons and daughters before he was translated, and among these was Methuselah, by whom the succession of the recorded generations is maintained.
Why, then, is so small a number of Cain’s generations registered, if it was proper to trace them to the deluge, and if there was no such delay of the date of puberty as to preclude the hope of offspring for a hundred or more years? For if the author of this book had not in view some one to whom he might rigidly trace the series of generations, as he designed in those which sprang from Seth’s seed to descend to Noah, and thence to start again by a rigid order, what need was there of omitting the first-born sons for the sake of descending to Lamech, in whose sons that line terminates,–that is to say, in the eighth generation from Adam, or the seventh from Cain,–as if from this point he had wished to pass on to another series, by which he might reach either the Israelitish people, among whom the earthly Jerusalem presented a prophetic figure of the heavenly city, or to Jesus Christ, “according to the flesh, who is over all, God blessed for ever,” the Maker and Ruler of the heavenly city? What, I say, was the need of this, seeing that the whole of Cain’s posterity were destroyed in the deluge? From this it is manifest that they are the first-born sons who are registered in this genealogy. Why, then, are there so few of them? Their numbers in the period before the deluge must have been greater, if the date of puberty bore no proportion to their longevity, and they had children before they were a hundred years old. For supposing they were on an average thirty years old when they began to beget children, then, as there are eight generations, including Adam