2 Corinthians 5:21

2 Corinthians 5:21 Him who did not know sin He made sin on our behalf that we might become the righteousness of God in Him.

according to this verse, we have been made the righteousness of God in Christ. How can we become the righteousness of God? By having Christ wrought into us. Christ is the embodiment of God, and that God, as a living Person, is righteousness. Therefore, righteousness, God, and Christ are one. The righteousness of God is God Himself. Since this God is embodied in Christ, Christ is the righteousness of God. Christ has been wrought into us, and we have been put into Christ. We have been mingled together with Christ as one. Thus, we become the righteousness of God. 

- "Life Study of Romans" P50