What does Romans 8:3 mean?
This verse continues to explain how it is possible that there is no condemnation from God for those who are in Christ Jesus by faith. This was stated in emphatic terms in verse 1, in a statement flowing directly from Paul's reference to Christ at the end of chapter 7.Paul has built a clear case that the law of Moses cannot save those who live under it. Instead, the law simply shows that we cannot keep the law (Romans 7:7–12). We cannot escape our sinfulness and make ourselves acceptable to God. He had to step in to save us, and He did. He did what the law—truly, our inability to keep the law—could not do.
What did God do? He sent Jesus, His Son, to earth in a human body just like all the other human bodies. Except Jesus' body was not full of sin (Hebrews 4:15). He never sinned. God sent Jesus in a body so that He could condemn all sin through the punishment of that one sinless body.
As the following verse will show, God did this because it was necessary to fulfill the law's requirement of death for sin and life for righteousness.