76. Noah, Lamech and Methuselah were very holy men, full of the Holy Spirit. Accordingly they performed their office by teaching, admonishing, urging and entreating, in season and out of season; as Paul says, 2 Tim 4, 2. But they reproved flesh and did unprofitable labor, for the flesh would not yield to sound teaching. Should I, says he, endure forever such contempt for my Word?
77. This proclamation, therefore, contains a public complaint, made by the Holy Spirit through the holy patriarchs, Noah, Lamech, Methuselah and others, whom God took away before the flood that they might not be spectators of so widely diffused wrath. All these, with one voice and mouth, admonished the giants and tyrants to repent, and added the threat that God would not endure forever such contempt of his Word.
78. But the flesh remained true to its nature; they despised faithful exhortations in their presumption and carnal security, and the holy patriarchs they treated as men in dotage and as simpletons because of their threat that God would move in wrath even upon his Church, namely, the heirs of the promise of the coming seed.
79. The added clause, "yet shall his days be a hundred and twenty years," Jerome affirms must not be understood as referring to the years of human life, nor to the age of individual men; for it is certain that after the flood many exceeded the two hundredth year. If you refer it to the years allotted to individuals, the promise would be that individuals should complete so many years, which, however, is false. Therefore he speaks of the time conceded to the world for repentance until the flood should arrive.
80. This interpretation agrees with what precedes. God shows that he is displeased with the perversity of men. He is full of solicitude and quite ready to forbear. Against his will, so to speak, he permits the flood to rage. Therefore, he decided upon a fixed and adequate time for them to come to their senses, and to escape punishment. All this time Noah admonished men to repent, making it clear that God could not longer endure such wickedness, while he was yet so kind as to grant adequate time for repentance.