2 Peter 2:20-22 (NLT)
20 And when people escape from the wickedness of the world by knowing our Lord and Savior Jesus Christ and then get tangled up and enslaved by sin again, they are worse off than before. 21 It would be better if they had never known the way to righteousness than to know it and then reject the command they were given to live a holy life. 22 They prove the truth of this proverb: �A dog returns to its vomit.� And another says, �A washed pig returns to the mud.�

Peter speaks of those who have learned of the saving grace God offers through Jesus, but then turn away from the truth which sets them free to return to the burdensome slavery of sin. These people are worst off than before for their lives are now in conflict to the righteousness God calls them to follow. Instead of following God they have returned to their previous sinful ways.

Perhaps Peter remembered the words of Jesus when he wrote the verses above. Jesus said in Matthew, �When an evil spirit leaves a person, it goes into the desert, seeking rest but finding none. Then it says, �I will return to the person I came from.� So it returns and finds its former home empty, swept, and in order. Then the spirit finds seven other spirits more evil than itself, and they all enter the person and live there. And so that person is worse off than before. That will be the experience of this evil generation.� Jesus was telling those listening that a person cannot leave themselves empty and without purpose to live for God or their emptiness will be filled with more sin than they previously experienced. The abandonment of living for Christ is worst than the ignorance of not knowing Christ for it is condemning a way of righteousness and pours contempt on God�s grace.