In some Christian religions, there is much discussion about the law on the one hand, and grace on the other. It’s a battle between law and grace. The Old Testament was about law, and the New Testament is about grace. Actually, law and grace aren’t opposites, they don’t collide with each other, and they don’t cancel each other out. They actually go together. It’s really law and grace. In fact, the law, the set of rules, the instruction, is actually a part of grace.
Grace, favour, love, and the law are all from the same God. For any of these to oppose the other would have to come from a double minded Saviour. Personally, I cannot follow a double minded God, or any other doctrine that endorses a double minded Saviour. When reading the Bible in the manner that it is given, we should know that our Savour gave the law to Israel because of His grace. Read Colossians chapter one. Jesus is the creator of all things, and He is also our Saviour. The end, the fulfilment, not a replacement differing from His own Father.