17 These people are springs without water and mists driven by a storm. Blackest darkness is reserved for them. 18 For they mouth empty, boastful words and, by appealing to the lustful desires of the flesh, they entice people who are just escaping from those who live in error. 19 They promise them freedom, while they themselves are slaves of depravity—for “people are slaves to whatever has mastered them.” 20 If they have escaped the corruption of the world by knowing our Lord and Savior Jesus Christ and are again entangled in it and are overcome, they are worse off at the end than they were at the beginning. 21 It would have been better for them not to have known the way of righteousness, than to have known it and then to turn their backs on the sacred command that was passed on to them. 22 Of them the proverbs are true: “A dog returns to its vomit,” and, “A sow that is washed returns to her wallowing in the mud.”
Peter concluded this chapter with a final renunciation of the false teachers and wicked. The key part of this passage are these words: people are slaves to whatever has mastered them. It’s as insightful as it is chilling. The slavery Peter talked about here refers to depravity. The bad keep getting worse if they don’t change course. How would they change course without someone to guide them?
Perhaps you know someone who is a slave to depravity. It comes in many forms and has many faces to it. This person needs your prayer. He/she is on your mind for a reason. Pray for them as if their life depended on it. YOu may be the only person praying for them and blessing them. Just consider them being caught in a web and not being able to get out. Try as they might, they need divine intervention. Pray that God will meet them.