For our sake God made HIM (Jesus) to be sin who knew no sin, so that in him we might become the righteousness of God. 2 Cor 5:21. 

Therefore, if anyone is in Christ, they are a new creation. The old has passed away; behold, the new 
has come. 2 Cor 5:17

My old self has been crucified with Christ. It is no longer I who live, but Christ lives in me. So, I live in this earthly body by FAITH in the Son of God, who loved me and gave himself for me. Gal 2:20