I. THE TERRORS OF GOD'S MIGHT. In that awful war of elements any moment might have been his last, and Pharaoh trembled. This plague evoked from him the first confession of sin. Hitherto he had reluctantly granted the request of Moses: now he casts himself as a sinner (27, 28) on God's mercy, and entreats the prayers of God's servant for himself and his people. There is a point at which the stoutest heart will be broken, and the cry be wrung from the lips, "I have sinned." "Can thine heart endure," etc. (Ezekiel 22:14).
III. THE VALUELESSNESS OF REPENTANCE BORN ONLY OF TERROR. God might thus bow all men under him, but the conquest would be worth nothing: men's hearts would not be won. When the terror is gone, Pharaoh's confession fails (30, 34, 35), for it has no root in any true knowledge of himself. He sees the darkness of God's frown, not the vileness of his transgressions. God is met with, not in the tempest and the fire, but in the still small voice which speaks within the breast. Many pass through gates of terror to hear this; but till God's voice is heard there, speaking of sin and righteousness and judgment, there is no true return of the soul to him.
III. THE FULNESS OF GOD'S MERCY. God knows the worthlessness of the confession, yet he is entreated for Pharaoh and the Egyptians. God's pity rests where men will have none upon themselves. Though they believe not, he cannot deny himself.—U.
Exodus
Exodus 9 - exodus-9 - worlddic.com