The Lamb of God took away the sins of man but did He also take away the law of God? If the law of God could be changed, why die to pay the penalty? Why not just change the law?
God is love is a constant principle. God’s moral law from Adam and Eve, through the laws of the Old Testament and till heaven and earth pass, while also constant, has been adapted for man’s benefit.
The Bible and the Ten Commandments given from Mt. Sinai were all designed for the benefit of and to meet the needs of man. Obedience brings blessings and avoids the damaging effects of sin.