1 Corinthians 2:4 And my speech and my preaching was not with enticing words of man’s wisdom, but in demonstration of the Spirit and of power:

The gospel, the good news, is simple. It is meant to be simple because it is the cure for our ills. It is just that simple. If you take the cure, what does it matter what ails you?

What ails you is a more complex problem. You can boil it down to sin if you would like but sin is the symptom not the disease. All you have to do to understand that is to look at the simplicity of the gospel to understand that.

1 Corinthians 15:3-4 For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures:

Christ died according to the promises made in the scriptures, He was buried according to the prophecies in the scriptures, He was resurrected as promised in the scriptures, and the purpose was for the forgiveness of sins.

Do the scriptures promise the end of sin in this life? No. Do the scriptures promise an end of sin infecting you again? No. It promised forgiveness of sin. It only treats the symptom and the disease is much more difficult to address.

2 Corinthians 5:17 Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.

Simply saying I am forgiven is like taking aspirin for a fever. It reduces the fever but does nothing to cure what caused the fever. The problem is more complex than the fact that I sinned and I am forgiven. It is about a changed life.

What if you woke up tomorrow and had no memory of who you were, what you had done, or what you wanted? That would represent forgiveness, but what would prevent you from making the same mistakes you made in a prior life you do not remember?