20 For if, after they have escaped the pollutions of the world through the knowledge of the Lord and Savior Jesus Christ, they are again entangled in them and overcome, the latter end is worse for them than the beginning. 21 For it would have been better for them not to have known the way of righteousness, than having known it, to turn from the holy commandment delivered to them. (2 Peter 2:20–21, NKJV)
Without a doubt, this passage warns Christians against falling away from Christ. The ones described here had escaped sin through knowing Christ; they had been untangled from sin’s snare by the power of the Lord (Romans 6:17-18). They had known the way of righteousness and the holy commandment of God, but now they had returned to sin’s filth and were overcome by it (2 Peter 2:22, 20). The Scriptures reveal the way of righteousness as the pathway of life (Proverbs 12:28). Wisdom travels its byways (Proverbs 8:20). Truth is spoke by its travelers (Matthew 21:32). The Lord knows those who walk its path (Psalm 1:6). He also knows those who turn aside to the right or to the left, leaving its holy commands for the unholy, sinful allurements of the world. Protect yourself against sin. Walk the path of righteousness in faith, guided by truth and strengthened with wisdom, and you will have life. If you have turned from its way, repent and return to the Father. He is ready and able to forgive you (1 John 1:8-9).