City of God

But in whatever manner the generations of Cain's line are traced downwards, whether it be by first-born sons or by the heirs to the throne, it seems to me that I must by no means omit to notice that, when Lamech had been set down as the seventh from Adam, there were named, in addition, as many of his children as made up this number to eleven, which is the number signifying sin; for three sons and one daughter are added. The wives of Lamech have another signification, different from that which I am now pressing.

For at present I am speaking of the children, and not of those by whom the children were begotten. Since, then, the law is symbolized by the number ten—whence that memorable Decalogue,— there is no doubt that the number eleven, which goes beyond ten, symbolizes the transgression of the law, and consequently sin. For this reason, eleven veils of goat's skin were ordered to be hung in the tabernacle of the testimony, which served in the wanderings of God's people as an ambulatory temple.

And in that haircloth there was a reminder of sins, because the goats were to be set on the left hand of the Judge; and therefore, when we confess our sins, we prostrate ourselves in haircloth, as if we were saying what is written in the psalm, “My sin is ever before me.” The progeny of Adam, then, by Cain the murderer, is completed in the number eleven, which symbolizes sin; and this number itself is made up by a woman, as it was by the same sex that beginning was made of sin by which we all die.

And it was committed that the pleasure of the flesh, which resists the spirit, might follow; and so Naamah, the daughter of Lamech, means “pleasure.” But from Adam to Noah, in the line of Seth, there are ten generations. And to Noah three sons are added, of whom, while one fell into sin, two were blessed by their father; so that, if you deduct the reprobate and add the gracious sons to the number, you get twelve—a number signalized in the case of the patriarchs and of the apostles, and made up of the parts of the number seven multiplied into one another—for three times four, or four times three, give twelve.

These things being so, I see that I must consider and mention how these two lines, which by their separate genealogies depict the two cities, one of earth-born, the other of regenerated persons, became afterwards so mixed and confused, that the whole human race, with the exception of eight persons, deserved to perish in the deluge.