19 The angel of God that had been leading the camp of Israel now shifted and got behind them. And the Pillar of Cloud that had been in front also shifted to the rear. 20 The Cloud was now between the camp of Egypt and the camp of Israel. The Cloud enshrouded one camp in darkness and flooded the other with light. The two camps didn't come near each other all night.
Matthew Henry's Commentary on Exodus 14:19-20
Commentary on Exodus 14:15-20
(Read Exodus 14:15-20)
Moses' silent prayers of faith prevailed more with God than Israel's loud outcries of fear. The pillar of cloud and fire came behind them, where they needed a guard, and it was a wall between them and their enemies. The word and providence of God have a black and dark side toward sin and sinners, but a bright and pleasant side toward the people of the Lord. He, who divided between light and darkness, Genesis 1:4, allotted darkness to the Egyptians, and light to the Israelites. Such a difference there will be between the inheritance of the saints in light, and that utter darkness which will be the portion of hypocrites for ever.