The Israelites go through the Sea. Moses reminds them, "The Lord God will fight for you."
Moses is called from a bush aflame with the presence of the Angel of the Lord. God is revealed in action, not in any other way.
Moses kills an Egyptian and derails God's plan. He flees into the desert where he marry's Jethro daughter.
After four hundred years in Egypt, the Hebrews were now slaves. Unknown to them, God was preparing for the Exodus.