For He made Him who knew no sin [to be] sin for us, that we might become the righteousness of God in Him. 2 Corinthians 5:21(NKJV)
Jesus Christ the Son of God knew no sin. He committed no sin. Like God the Father He is Righteous. He is the Righteousness of God. 1 Corinthians 1:30. He is the expression of God’s Righteousness.
On the Cross He who knew no sin and committed no sin was made sin for us who were sinners that we through Him might be made the Righteousness of God.
In Him we are now sons of God, we are sons of Righteousness. The same Righteous nature of our Heavenly Father is our true nature. Ephesians 4:24.
You’re a son of Righteousness in Christ Jesus. Fill your mouth and mind with this truth and you will live and walk as the righteous one you truly are.