17 But if Enoch was translated, and Noah was preserved at the deluge, I do not think that Enoch was translated because he had a wife, but because he was the first to call upon God and to believe in the Creator; and the Apostle Paul fully instructs us concerning him in the Epistle to the Hebrews. Noah, moreover, who was preserved as a kind of second root for the human race, must of course be preserved together with his wife and sons, although in this there is a Scripture mystery. The ark, according to the Apostle Peter, was a type of the Church, in which eight souls were saved. When Noah entered into it, both he and his sons were separated from their wives; but when he landed from it, they united in pairs, and what had been separated in the ark, that is, in the Church, was joined together in the intercourse of the world. And at the same time if the ark had many compartments and little chambers, and was made with second and third stories, and was filled with different beasts, and was furnished with dwellings, great or small, according to the kind of animal, I think all this diversity in the compartments was a figure of the manifold character of the Church.
Source: Against Jovinianus (New Advent)