We must search the scriptures to learn of all commandments of God that was not nailed to the cross. ( of the father, the son and the holy ghost) so that we may obey them all because if we do not we will be under the law and condemned by it. To be under grace and have the law written in our hearts we must obey it all by repenting and confessing to Jesus when we fall short of keeping the whole law. If we want to save our soul in the end and be saved from sin and the world now; we must keep it all.