2 Peter 2:17-22

These [false teachers] are springs without water and mists driven by a tempest, for whom is reserved the gloom of black darkness. For uttering arrogant words of vanity [pompous words disguised to sound scholarly or profound, but meaning nothing and containing no spiritual truth], they beguile and lure using lustful desires, by sensuality, those who barely escape from the ones who live in error. They promise them liberty, when they themselves are the slaves of depravity—for by whatever anyone is defeated and overcome, to that [person, thing, philosophy, or concept] he is continually enslaved. For if, after they have escaped the pollutions of the world by [personal] knowledge of our Lord and Savior Jesus Christ, they are again entangled in them and are overcome, their last condition has become worse for them than the first. For it would have been better for them not to have [personally] known the way of righteousness, than to have known it and then to have turned back from the holy commandment [verbally] handed on to them. The thing spoken of in the true proverb has happened to them, “THE DOG RETURNS TO HIS OWN VOMIT,” and, “A sow is washed only to wallow [again] in the mire.” [Prov 26:11]