Blood, Frogs, and Lice

Today we finally begin to read through and consider the plagues God has visited upon Egypt! These were mighty works, designed to display the power and glory of God above every power conceivable to man. Here, in the first section of these wonders, God turns the Nile to blood, sends frogs upon the land, and brings lice out of the dirt. But what do such things tell us about God? If these are to be a demonstration of God and his power, what are they telling us?