And the LORD said unto Noah,
Come you and all your house into the ark; for you have I seen righteous before me in this generation.
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Augustine of Hippo
AD 430
Let us recognize that the ark prefigured the church. Let us be the clean beasts in it. Yet let us not refuse to allow the unclean ones to be carried in it with us until the end of the deluge. They were together in the ark, but they were not equally pleasing to the Lord as a savor of sacrifice, for after the deluge, Noah offered sacrifice to God of the clean, not of the unclean. But the ark was not on that account abandoned before the time by any of the clean because of the unclean.