[Although] their talk is big, what they say is worthless, and by [offering people] fleshly desires [i.e., sexual gratification], they lead people astray, who are barely escaping from the error of the world.

It has happened to them like the true proverb [says], "The dog [throws up, and then] goes back and eats its own vomit," and "The hog that was all cleaned up [goes back] to wallowing in the mud."