Exodus 8:15

15.Blot when Pharaoh saw. Hence it appears that the wretched tyrant, like a winding serpent, twisted and turned his mind to crooked counsels; for when he was trembling beneath the present feeling of God’s power, he dared not obstinately resist any longer; he only sought a little breathing time; now, being freed from fear, he returns to his former contumacy. But this is a sign of a perverse and crooked disposition, not to submit willingly, but to pay only a temporary deference, when necessity is more than usually urgent. God foreknew, and had foretold to Moses, that this perfidy was hidden in the recesses of his heart; but he was willing to bring it to light, and therefore remitted the punishment; and hence was the opportunity for dissembling.