Romans 8:3

What the law could not do. Because of the resistance it met in human nature. It was not strong enough to overcome the tendency of the flesh, the carnal nature, to evil. God did this by sending his own Son in the likeness of sinful flesh. When Christ came in human form he took the likeness of sinful flesh.

And for sin. As a sacrifice for our sins. See Joh 1:29.

Condemned sin in the flesh. To "condemn" is to sentence and to devote to destruction. Sin is condemned, (1) By the spotless life of Christ. In the flesh he was without sin. (2) By his death for sin our past sins are forgiven. (3) By our vital union with his death and life we rise to walk in a new life, with a new spirit, and hence, not under the power of the flesh. See Ro 6:4.
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