Moses and Exodus 8

Moses was called by God to a burning bush that was not actually burning. That will get your attention! Actually, all three persons of the trinity Godhead were present at the burning bush! The Lord says He "knows" and "remembers" His people in Egypt. What does that mean? Moses said, "I have become a stranger in a strange land." What did he mean? And what was it about life in Egypt for the Israelites that moved God to rescue them through Moses?