THERE ARE BASICALLY TWO KINDS OF LAW: (l) law as the way things ought to be, and (2) law as the way things are. An example of the first is "No Trespassing." An example of the second is the law of gravity.
God's law has traditionally been spelled out in terms of category no. 1, a compendium of dos and don'ts. These dos and don'ts are the work of moralists and, when obeyed, serve the useful purpose of keeping us from each other's throats. They can't make us human, but they can help keep us honest.
God's law in itself, however, comes under category no. 2 and is the work of God. It has been stated in seven words: "Whoever does not love abides in death" (1 John 3:14). Like it or not, that's how it is. If you don't believe it, you can always put it to the test just the way if you don't believe the law of gravity, you can always step out a tenth-story window.