Behold, I myself will harden the hearts of the Egyptians, and they shall go in after them: and I will get myself honor over Pharaoh, and over all his armies, over his chariots, and over his horsemen.
God hardens the Egyptians not by bare permission but by active influence of His power, so they cast themselves into the sea though they must have seen it armed against them. He wanted a double miracle: safe passage for His people and the flower of Egypt destroyed, so they would know His power could not be resisted.
AI summary
Moses lifted up his heart in silent prayer more effectually than Israel's loud outcries, but now God calls him from prayer to action at his post. Every thing is beautiful in its season; when we are in the way of duty we must go forward, not stand in mute astonishment, and leave the event to God.
AI summary
Commenting on Exodus 14:15-20
God hardens Pharaoh's heart so the Egyptians feel no fear, thoughtless and hurried on by malice and revenge, supposing the sea as safe for them as for Israel. Their utter destruction brings Him honor in just retaliation for the innocent infants they drowned in the Nile.
AI summary