Well, that will be a surface understanding of it. But we can go deeper. Try not to focus on the deed or action but the revelation of who God is.
When Christians today speak of the law, we mostly have a bad impression. [And our Adventist brothers are not making it any easier.
] Many when we say of a certain matter, That is just the law! It seems that the law is something bad. This is wrong.
To say that the law is simply the commandments from Moses is too common. In the ancient time God had Israel as His people. As a people, there was the need for regulation in their life and walk. If there is no law, there is no regulation for living. The law, therefore, is the regulation of the life of Gods people. This is the basic definition of the law.
Today, just as the people of Israel in the ancient time, the believers are the people of God, who need to be regulated. By what are we regulated? It is not by Moses but by God Himself. As the people of God, we must be regulated by God in our life, our walk, and our daily living. God must be our law.
Do not think that the law in the Scriptures is something bad. According to the proper understanding, the law is God Himself, or using the scriptural term, the law is the
testimony of God. The testimony of God is the description of God.
The purpose of the law is to testify, define, and describe God. As the people of God, our walk, living, conduct, and entire being must correspond to this very God.
What kind of God do we have, and what are His attributes? This is the purpose of the law. The law was given to tell us what kind of God we have. We may compare it to a document that describes a certain person, telling us his size, hair color, and other features. Such a document would be the testimony of this person. In the same way, the law is the description and definition of God, so it is His testimony. We as His people must be regulated in our walk and living by this description, this testimony.
The law of the Old Testament was the law of letters outside of the people of God. On the one hand, the law testified and described God, but on the other hand, it also demanded the people to correspond to Gods attributes. As to God, it testified, but as to the people, it demanded and eventually condemned. If one was able to correspond to Gods law, the law was only a demand, but if one could not correspond with the demand, the law was a condemnation. This is the old law, the law in letter.
[New Testament] The new law is still the law; in this sense it is the same. The law in letter was the testimony of God, and the law in life is still the testimony of God. However, this same law is now not in letter but in life. The law within us today is the very living God. Christ as the reality of the law has come into us. He, as the living God who is holy, righteous, of love, and in light, who in the ancient times was described by the written law, has come into us as the new law [Rom 8:2]. Today God Himself is the law. We may prefer the old way of the law, because the new way is too bothersome. The old way is simply to write down all the commandments, and if we act according to them, we are all right. The new way, however, is a living Person.
There is no written commandment. Whatever we do, we must go to Him. We always need to contact Him and see His face. In the New Testament, the testimony of God is God being wrought, inscribed into us as the One who is living and working within us. How much God is wrought into us as our life and supply, is how much we become the testimony of God. As more God as life grows in you, spontaneously He is expressed out of you as the testimony of God.
Hope this helps a bit. P.S. Re: example of the document ... since Christ came, why do we still cling to the document describing a person than the real person Himself