Honestly, I do not know what you define justification as. There is salvation and justification. Justification, to me, is Jesus’s death on the cross to save us from our sins, opening the gates of heaven for it to be possible for us to enter heaven. Salvation, to me, is my entrance into heaven, which is decided by me by my own actions. My choices in regards to how I respond to my belief in Jesus.
Jesus’ death on the cross is the atonement.
Justification is us being declared righteous by God through our faith in that atoning work.
Sanctification is the process of becoming more and more Christlike as we live out our Christian life.
But a person is saved the minute God declares him righteous and indwells him with the Holy Spirit who seals us and guarantees our inheritance in heaven. That puts us IN CHRIST, who becomes our righteousness. The righteous deeds He did and the righteous life He lived is credited to our account, so that’s what God sees when He looks as us IN CHRIST.
That is why He is able to deal with us as if we had never sinned even though we still do. It’s a judicial pardon with the death of Jesus being adequate to forgive, completely and fully with no debt remaining to be paid, ALL our sin,
EVERY.
LAST.
ONE.
whether we remember them or not and remember to confess them or not, if we are even aware that we committed them.