Romans 8:3

Romans 8:3 For that which the law could not do, in that it was weak through the flesh, God, sending His own Son in the likeness of the flesh of sin and concerning sin, condemned sin in the flesh,

In order that God might be able to forgive us, Christ, the Son of God, became flesh. As 8:3 says, God sent His own Son in the likeness of the flesh of sin. By incarnation, the Lord took upon Himself the likeness of the flesh, and became identified with sinners in the flesh. For the saake of God's righeousness, the Lord Jesus was put to death on the cross. There, on the cross, He was made sin for us, and God condemned sin in the flesh. By dying on our behalf the Lord accomplished redemption and fulfilled all of God's righteous requirements. Now God has the position righteously to forgtive us. In fact, He not only can forgive us, but for the sake of His righteousness, He must forgive us.

- "Life Study of Romans" P598