1. Just as there have been false prophets in the midst of the people of Israel, so will there be false teachers among you. They will introduce harmful sects and, by denying the Master who saved them, they will bring upon themselves sudden perdition.
2. Many, nonetheless, will imitate their vices and because of them the Way of Truth will be discredited.
3. They will take advantage of you with deceitful words for the sake of money. But their condemnation has already begun and their destruction awaits them.
4. In fact, God did not pardon the angels who sinned but cast them into hell, confining them in the dark pits, keeping them there until the Day of Judgment.
5. Neither did he pardon the ancient world when he unleashed the waters of the flood upon the world of wicked people, but protected only Noah, the eighth prophet of righteousness.
6. God also condemned the cities of Sodom and Gomorrah, reducing them to ashes, to serve as a warning to the wicked in the future.
7. But he saved Lot, a good man deeply afflicted by the unbridled conduct of those vicious people.
8. For Lot, a righteous man who lived in their midst, suffered day after day in the goodness of his heart as he saw and heard of their crimes.
9. So, then, the Lord knows how to free from trial those who serve him and keep the wicked for punishment on the Day of Judgment.
10. He will do this especially for certain people who follow the baser desires of their nature and despise the Lord's majesty. Proud and daring they are not afraid of insulting fallen spirits
11. while the angels, who are superior to them in strength and power, do not permit themselves any injurious accusation in the presence of the Lord.
12. Those people are like irrational animals born to be caught and killed; after they have slandered what they cannot understand, they will end like animals
13. and they will suffer the repayment of their wickedness. They enjoy fleeting pleasures; they are obscene and vicious who delight in deceiving you when they share in your fraternal meals.
14. They cannot look at a woman without desiring her, they do not tire of sinning and seducing weak souls. They are full of greed - an accursed people.
15. They abandoned the right way and followed Balaam, son of Beor who was attached to what he gained from his wrongdoing.
16. But he was rebuked for his sin: his she-ass began to speak with a human voice, stopping the prophet in his madness.
17. These people are like waterless springs, clouds driven by a storm which move swiftly into the blackest darkness.
18. With their boastful and empty discourses, they encourage the lust and impure desire of those who have just freed themselves from the common errors.
19. They promise freedom when they themselves are slaves of corruption: for people are slaves to whatever dominates them.
20. Indeed, after being freed from worldly vices through the knowledge of the Lord and Savior Jesus Christ, they returned to those vices and surrendered to them; and their present state has become worse than the first.
21. It would have been better for them not to have known the way of holiness than, knowing it, to turn away from the sacred doctrine that they had been taught.
22. In their case these proverbs are relevant: "The dog turns back to its own vomit," and: "Hardly has the pig been washed than it again wallows in the mud."