If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. 1 John 1:9 (ESV)
What do you do if you have confessed your sin and received God’s forgiveness but continue to be afflicted with the after effects of your transgression? The after effects are the stain of sin – the residual vexation in your soul over what you have done. The stain of sin often is the shame, embarrassment or feelings of failure that continue to plague you. It can be a self loathing and inability to forgive yourself for the stupid choices that you’ve made. The stain of sin can also be an obsessive preoccupation with reliving your sin, which dangerously can become the tool of the flesh and the devil to subtlety lure you back into sins lair.
The quintessential verse in the Bible promising God’s unmitigated forgiveness process for repentant sin is quoted above from the first epistle of John. As an apostle, John had been privy to Jesus’ many teachings on the forgiveness of sin. He had been a witness at the foot of the cross where Jesus paid its awful price through the shedding of His blood. (see 1 John 1:7) And after the resurrection, he had seen first hand Jesus’ merciful forgiveness completely restore his buddy, the repentant denier, Peter.
It is important to note from John’s verse that forgiveness of sin has two key aspects. They are the forgiveness and the cleansing. In simple terms, the forgiveness part is God forgetting our sin and the cleansing part is God helping us to forget it.