For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh:
The Law can never get us to fulfill its sacred requirements, but grace has succeeded where the Law failed. The Law could not produce holy living because it was weak through the flesh. The problem is not with the Law but with those who the Law was given. The Law spoke to individuals who were already sinners and did not have the strength to obey it. But God intervened by sending His own Son in the likeness of sinful flesh. Jesus did not come in sinful flesh itself, but in the “likeness” of sinful flesh. Remember – Jesus did no sin (1 Peter 2:22), knew no sin (2 Corinthians 5:21), and had no sin in Him (1 John 3:5). As a sacrifice for sin, Christ condemned sin in the flesh. He not only died for the sins we commit but for our sin nature.