The closing verses, as we have already noticed, are a kind of summing-up of the whole narrative of the plagues and their effects on Pharaoh. They open two difficult questions, as to how and why it was that the effect of the successive strokes was so slight and transient. They give the 'how' very emphatically as being that 'Jehovah hardened Pharaoh's heart.' Does that not free Pharaoh from guilt? And does it not suggest an unworthy conception of God? It must be remembered that the preceding narrative employs not only the phrase that 'Jehovah hardened Pharaoh's heart,' but also the expression that Pharaoh hardened his own heart. And it is further to be noted that the latter expression is employed in the accounts of the earlier plagues, and that the former one appears only towards the close of the series. So then, even if we are to suppose that it means that there was a direct hardening action by God on the man's heart, such action was not first, but subsequent to obstinate hardening by himself. God hardens no man's heart who has not first hardened it himself. But we do not need to conclude that any inward action on the will is meant. Was not the accumulation of plagues, intended, as they were, to soften, a cause of hardening? Does not the Gospel, if rejected, harden, making consciences and wills less susceptible? Is it not a 'savour of death unto death,' as our fathers recognised in speaking of 'gospel-hardened sinners'? The same fire softens wax and hardens clay. Whosoever is not brought near is driven farther off, by the influences which God brings to bear on us.
The 'why' is stated in terms which may suggest difficulties,--'that my wonders may be multiplied in the land of Egypt.' But we have to remember that the Old Testament writers are not wont to distinguish so sharply as more logical Westerns do between the actual result of an event and its purpose. With their deep faith in the all-ruling power of God, whatever had come to pass was what He had meant to come to pass. In fact, Pharaoh's obstinacy had not thwarted the divine purpose, but had been the dark background against which the blaze of God's irresistible might had shone the brighter. He makes the wrath of man to praise Him, and turns opposition into the occasion of more conspicuously putting forth His omnipotence.