266. The name Jabal is derived from the verb jabal, which signifies to bring forward, or to produce.
V. 21. And his brother's name was Jubal; he was the father of all such as handle the harp and pipe.
267. And the name Jubal has the same origin and signification; for it means produced, or introduced. Both these names, therefore, contain a wish or prayer of Lamech concerning the increase of his family. The posterity of Cain always entertained the object and expectation of surpassing in numbers. And, no doubt, the Cainites held up this temporal blessing in the face of the true Church as an evident proof that they were not cast off by God, but were the very people of God.
V. 22. And Zillah, she also bare Tubal-cain, the forger of every cutting instrument of (an artificer in every workmanship of) brass and iron; and the sister of Tubal-cain was Naamah.
268. Tubal-cain signifies, produce property. So the Romans gave such names as "Valerius" (from valeo), and "Augustus" (from augeo). And Naamah received her name from her sweetness, or beauty. This posterity of Cain increased infinitely; hence Moses breaks off at this point.
269. Now, when he not only chronicles names but makes mention also of the deeds and labors of each one, the Jewish explanation is to be rejected that the offspring of Cain was compelled to follow other occupations because the earth was cursed, and hence gained their livelihood, one as a shepherd, another as a worker in brass, and another as a musician, obtaining grain and the other fruits of the earth from the offspring of Adam. But if the Cainites had been so severely pressed by hunger, they would have forgotten the harp, organ and other instruments of music in their extremity; for the enjoyment of music is not characteristic of the hungry and thirsty.
270. Their invention of music and their efforts in the discovery of other arts is proof that they had the necessaries of life in abundance. The reason, therefore, that the descendants of Cain turned to these pursuits and were not contented with the simple food the earth produced, like the descendants of Adam, was that they wished to rule, and aimed at the high praise and glory of being men of talent. I believe, however, that some of them passed over to the true Church and followed the religion of Adam.
271. And such as Moses here describes the generation of the wicked, or the false church, to be, from the beginning down to the mighty flood of waters, so we find it ever, and such it will remain until the final flood of fire. "The sons of this world are for their own generation wiser than the sons of the light," Lk 16, 8. Therefore it is that they ever advance and increase, and commend themselves and their own, and thus acquire riches, dignities and power; while the true Church, on the other hand, always lies prostrate, despised, oppressed, excommunicated.