But it is happened unto them according to the true proverb, The dog is turned to his own vomit again; and the sow that was washed to her wallowing in the mire.
But. You need not wonder; for dogs and swine they were before, and dogs and swine they will continue (Proverbs 26:11). They 'scarcely' (2 Peter 2:18) have escaped from their filthy folly, when they again are entangled in it. Then they seduce others who have in like manner 'for a little time escaped from them that live in error' (2 Peter 2:18). Peter quoted Proverbs in his first letter (2 Peter 1:7; 2 Peter 2:17; 4:8,18): another proof that both letters come from the same writer.