The law of God was there from day one. It was not a law for the Jews as such. It was a law to mankind, to everybody. To obey the law of God shows your love to God and your neighbor. If Jesus could hold the law, so can anybody who really wants to. The person that says it cannot be done needs to try it first because it is obvious that he has not. The law of God can be held because it has been written on the believer's heart and it is not a burden to obey them as the grace of God leads you on the right path and gives you the strength to do it. It becomes such a joy to hold it as you know that you are that one step closer to God than the others who do not even try but always find excuses why they should not hold the law of God. Obviously,the first step to take is to become a child of God. Try it, it works.