When we confess our sins to God, we are agreeing with God that we were wrong, that we have sinned. God forgives us, through confession, on an ongoing basis because of the fact that He is “faithful and just.” How is God “faithful and just”? He is faithful by forgiving sins, which He has promised to do for all those who receive Christ as Savior. He is just by applying Christ’s payment for our sins, recognizing that the sins have indeed been atoned for. John Owen
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)
All of our sins are forgiven “positionally” the moment we receive Christ as Savior. This positional forgiveness guarantees our salvation and promise of an eternal home in heaven.