1 John 1:9 - NASB
9 If we confess our sins, He is faithful and righteous to forgive us our sins and to cleanse us from all unrighteousness.
The standard or book of rules (the law), that God provided for us to measure ourselves by, was taken away when we became believers “in Christ.” Jesus Christ fulfilled every bit of the law leaving none of it for us to even attempt to keep.
When you were dead in your sins and in the uncircumcision of your sinful nature, God made you alive with Christ. He forgave us all our sins, having canceled the written code, with its regulations, that was against us and that stood opposed to us; he took it away, nailing it to the cross. (Colossians 2:13-14)
This righteousness from God comes through faith in Jesus Christ to all who believe. There is no difference, for all have sinned and fall short of the glory of God, and are justified freely by his grace through the redemption that came by Christ Jesus. (Romans 3:22-24)
In him we have redemption through his blood, the forgiveness of sins, in accordance with the riches of God’s grace that he lavished on us with all wisdom and understanding. (Ephesians 1:7-8)
The thing that separated us from God (death) was sin. The purpose of the law was used to make us aware of our sinfulness. It condemned us so that we could then recognize our condition: Dead and in need of life!
Therefore, there is now no condemnation for those who are in Christ Jesus, because through Christ Jesus the law of the Spirit of life set me free from the law of sin and death. (Romans 8:1-2)
For what the law was powerless to do in that it was weakened by the sinful nature, God did by sending his own Son in the likeness of sinful man to be a sin offering. And so he condemned sin in sinful man, in order that the righteous requirements of the law might be fully met in us, who do not live according to the sinful nature but according to the Spirit. (Romans 8:3-4)
Jesus is the single source of eternal life. Since you and I are “in Christ,” there is no condemnation (death sentence) awaiting us. The law has been fully met in us. How? Because we already know that we deserve death –we’re guilty as charged– and the penalty was completely paid.
He paid it all and there is nothing remaining for us to pay. We have absolutely no sin left unpaid! There is no longer any sin that can separate us –in any way– from God. (You might want to read the section on 1 John 1:9, “The Christian Bar of Soap”.)