God is reintroducing himself to his people. He made a covenant with their ancestors, but they have been in slavery for several generations. His introduction is made up of miraculous acts of judgement. All of God’s miracles show that he is in control over nature, food and even families. In chapter 4, the people believed Moses because of the miracles he did. In chapter 6, they become very discouraged because of their circumstances as slaves (v. 9). How awe-inspiring it would have been for them to see something more powerful than their slave masters totally disrupting their everyday life and eventually bringing judgement on them. And then how amazing it would be to see God’s power leading you safely and providing for you. What an incredible reintroduction.