I think it is interesting that God identifies Himself to Moses as the God of Abraham, Isaac and Jacob. This tells me that Moses knew something of the history of these individuals, either from his parents' instruction during the limited time he had with them, or because of his own studies. Perhaps before he made his decision to identify with the people of God rather than continue to enjoy the privileges of the Pharaoh's household (Hebrews 11:24-25), he had examined the beliefs of the Hebrews who were all around him, and to whom he knew he was related. At any rate, he must have been familiar to some extent with Abraham, Isaac and Jacob, or else God probably would not have identified Himself to Moses in this way.
Can you imagine what Moses was thinking at this point? What did this holy God want with him?