For what the law could not do in that it was weak through the flesh, God did by sending His own Son in the likeness of sinful flesh, on account of sin: He condemned sin in the flesh, 4 that the righteous requirement of the law might be fulfilled in us who do not walk according to the flesh but according to the Spirit. Romans 8: 3, 4

“While we are to be in harmony with God’s law, we are not saved by the works of the law, yet we cannot be saved without obedience. The law is the standard by which character is measured. But we cannot possibly keep the commandments of God without the regenerating grace of Christ. Jesus alone can cleanse us from all sin. He does not save us by law, neither will He save us in disobedience to law.”  (Faith and Works, pp.95, 96)