First, the verse from 2 Peter is talking about false teachers and their destruction. Read the description of them. It even says that they "blaspheme in matters they do not understand (v12)." So the original verse was very out of context and did not have appropriate background provided.
THE MAJOR POINT EVERYONE IS MISSING IS THIS:
After giving all the description of their wrongdoings, Paul says that "
IF they have escaped the corruption of the the world by knowing our Lord and Savior Jesus Christ and are again entangled in it and overcome [by it], then they are worse off at the end than they were at the beginning." You see, Paul is saying that they
HAVE NOT escaped the corruption of the world by knowing our Lord and Savior Jesus Christ because, going back to the other verse from Hebrews, it is impossible to truly experience Christ and walk away from it forever. He is saying, look at their behavior and tell me if they have a saving faith, because I don't see anything that tells me they do.
It is so impossible to taste the goodness of the Lord and turn your back that he is emphasizing that they would be even "worse" sinners (which isn't possible) if they turned toward Christ for forgiveness,
knew him and communed with him, and then turned their backs on him to live a life of sin and deny his existence, and then want foregiveness later.
In all the discussion I didn't see, or maybe I missed, one key element. I think the passages that we are referring to have to do with being saved or not being saved at the beginning. I believe that, if you TRULY have asked Christ in your life and you have a deep down desire to do his will and to bring him glory (although you know that you will fail from time to time and you may stray from time to time), you are always saved.
I think the problem is that in the world many people think they know God or think they know who Jesus is, but they have never denied themselves and repented that first time saying I can't do anything without you Lord, I need you as Lord of my life and my savior, come into my life and take away my sins by your blood. The Bible talks about the fact that, at judgment day, many will come before the Lord and say, "Lord, we cast out demons in your name. Lord we did this in your name." Then the Lord will say, leave my presence, I never knew you.
I believe those verses apply very well to this situation. There are people in this world that have a works-based "religion" and not a saving faith. People think that if they go to church or do good things and serve others, that they will get to heaven. It's not true. A saving faith produces those good works in our lives, that were already planned for us to do in Eph. 2.
So Paul states that it is impossible for someone to taste the goodness of Christ and walk away. It is called irresistable grace. If we have the Lord in our hearts, we cannot be lost forever, we will eventually be reconciled to God again, but the point is that nothing can separate us from the love of Jesus, saving love.
