God brings complete forgiveness and redemption through Jesus Christ. “And you, who were (spiritually) dead in your trespasses and the uncircumcision of your flesh [Gentiles], God made alive together with him (Jesus), having forgiven (to cause something to cease by obliterating any evidence; to wipe away or eliminate) us all our trespasses, HOW? by canceling the record of debt that stood against us with its legal demands. (What are the legal demands of the record of debt against us? All have sinned…the wages of sin is death) This (the legal demand of death) he [GOD] set aside, nailing it to the cross (in Christ, for he died the death I should have died for the sinner I am and the sin I commit).”
Mark 10:45 For even the Son of Man came not to be served but to serve, and to give his life as a ransom for many. Jesus died on our behalf and thus complete forgiveness and redemption are possible from God, through him: Romans 3:25-26. God brings complete forgiveness and redemption through Jesus Christ and we remember that in baptism.
God fulfills his promise in Genesis 3 by crushing the head of the serpent in Christ Jesus. “He disarmed the (evil) rulers and authorities and put them to open shame (conquering kings in those days would parade their prisoners of war through the city to shame them), by triumphing over them in him (Jesus).”
Christus Victor, or Christ the victor is a sometimes overlooked part of the theology of the cross, but it is a very real part of the story of redemption as God promised it would be in Genesis 3:15 “He will crush your head” is fulfilled in “he disarmed the rulers and authorities and put them to open shame.” What does that mean for you and I? It means Romans 8:37-39; It means Galatians 6:14; It means Ephesians 6:10ff. While we still fight, nothing can separate us from Christ and he has already and ultimately triumphed over evil, sin, Satan, death and hell.