Exodus 7:5

5.And the Egyptians shall know. This is a species of irony, viz., that the Egyptians, subdued by the plagues, should at last begin to feel that their contention was against God. The object, however, of God was to encourage Moses, lest he should fail before the madness and fury of his enemies. Therefore, although the Egyptians might be stupid n their rage, still God declares that in the end they would know that they had fought to their own destruction when they waged war against heaven; for there is an implied antithesis between their tardy acknowledgment of this and their present slowness of heart, which was at length forcibly removed when God thundered openly against them from heaven. For we know how unconcernedly the wicked oppose their (79) iron obstinacy to the Divine threatenings, until they are forced into a state of alarm by violence; not because they are humbled beneath the hand of God, but because they see that by all their raging and turbulence they cannot escape from punishment; just as drunkards, awakened from their intoxication, would willingly drown their senses in eternal sleep, and even in annihilation; yet, whether they will or not, they must bear the pains of their intemperance. Moreover, this acknowledgment which was to be extorted from the unwilling, admonished Moses and others (80) to attribute just praise to the power of God, before they were experimentally convinced of it. It is true, indeed, that the sincere worshippers of God also are sometimes instructed by punishments, (to which reference is made, Isaiah 26:9, “when thy judgments are in the earth, the inhabitants of the world will learn righteousness;”) but a kind of “knowledge” is here pointed out which so prostrates the reprobate that they cease not to lift up their horns, as it were, against God; and thus it casts them down without amending them. There was also an experimental knowledge for the elect people, of which mention has been already made, (Isaiah 6:7,)

“ye shall know that I am the Lord your God, after that I shall have brought you out from the land of Egypt;”

but this (properly speaking) is nothing more than a confirmation of the faith which, before the event takes place, is content with the simple word. Or, God certainly, by the event itself, reproves the dullness of His people when He sees that their confidence in His own word is not sufficiently strong. But the wicked so know God, that, lost in shame and fear, they see not what they do see.