What God Says The Lord Does

By reading the Exodus, I thought about something we talked and discussed in class about one week ago. We talked about the difference between God and the Lord God. There are many theories about them. Some say they are two different ideas (or believes) but some say they are the same one. The real truth we'll never know. But I believe that they are both the same idea, but we use the terms God or Lord God depending on what we are referring to. For example, if we are talking about more general ideas like what to do, we use the term God. But if we talk about more specific things like how to do something, we use the term Lord God.
When I read the first seven chapters of the Exodus, I was able to see this. When God told Moses to go to Egypt to let the Hebrews (Israelites) out and give them freedom, I noticed that it was God the one who first talked to him. "5) And he said, Draw not nigh hither: put off thy shoes from off thy feet, for the place whereon thou standest is holy ground." (Exodus Chapter 3, verse 5) And after the God talked to him, the Lord did. "7)And the Lord said, I have surely seen the affliction of my people which are in Egypt,....8)And I am come down to deliver them out of the hand of the Egyptians, and to bring them up out of that land unto a good land and a large, unto a land flowing with milk and honey;..." (Exodus Chapter 3, verses 7 and 8).
After I read to this passages I was able to conclude that my theory was right. That God and the Lord God are the same idea. But each of the terms are used depending on the context. First, the text refers to God when He told Moses, that he needed to do something with the Hebrews in Egypt. God told him what to do. But later, the text refers to the Lord. And the Lord tells Moses what he needs to do in order to take out the Hebrews from Egypt. God tells more in general what needs to be done, while the Lord tells how to do what God had said. What God says, the Lord does.