I hope the Reader will not lose sight of the great doctrine included in this. All things whether they mean so, or not, must minister to God's glory. See Revelation 15:3. and particularly that scripture, Proverbs 16:4.
Related Commentaries of Exodus 14:4
Exodus 14:4
4 And I will harden Pharaoh's heart, that he shall follow after them; and I will be honoured upon Pharaoh, and upon all his host; that the Egyptians may know that I am the LORD. And they did so.