What does 2 Peter 2:21 mean?
This verse is part of a larger thought contained in verses 20 through 22. Peter appears to be referring to the ones enticed and deceived by the false teachers in the church. One of the lies of the false teachers was that Christians should freely participate in indulging their sinful desires. Peter describes the effect of this teaching on those who had escaped from the practice of the world and entered into the community of the church.These were people who heard and understood the gospel of Jesus but who had apparently not yet fully trusted in Christ. According to scripture, merely knowing about God is not the same as having a saving faith in Christ (James 2:19). These potential believers were misled by the false teachers and overcome again by their worldly practices.
Peter writes that it would have been better for them never to have heard the gospel, and never to have been told about the way of righteousness, than to know "the holy command"—the gospel, the command to trust in Christ—and to turn away from it.
Why would it be better? Partly because once that message has been heard and rejected, or corrupted, it is very unlikely someone will return again to believe and trust in it. Their attitude towards the gospel is now warped, distorted, and stained. They have added a series of roadblocks and hang-ups to their path towards genuinely accepting Christ. These complications make it all the harder for them to submit to God, and experience eternal salvation with God the Father.
No wonder Peter comes across as so angry in his condemnation of the false teachers. They were effectively leading people away from the hope of Christ and back to their own path of destruction.
2 Peter 2:10–22 further describes the sins of the false teachers spreading deception in the early church. Prior verses explained how God judged evil in the past, while saving those who were faithful. This passage describes those who reject Christ in favor of the world as ''enslaved'' by their own sins. No matter what they may claim, such persons prove their spiritual condition by constantly returning to their moral filth.
False teachers had entered the early community of Christians. These deceivers lied to the believers, challenging the authority of Jesus. They also invited others to indulge in their sexual sin. Sadly, there are still versions of these false teachers plaguing the modern Christian community. Peter harshly describes the sins of these ''cursed children,'' the eternal judgment waiting for them, and the tragic impact their deception is having on those enticed by them.