Much of Pharaoh's own property perished, but he was the last man in the country who would feel personal inconvenience by the loss, and therefore nothing was more natural than that his selfish "heart was heavy, and he did not let the people go." Not even such an effort was needed as in the previous plague, when we read that he made his heart heavy, by a deliberate act.
There was nothing to indicate that he had now reached a crisis--that God Himself in His judgment would henceforth make bold and resolute against crushing adversities the heart which had been obdurate against humanity, against evidence, against honour and plighted faith. Nothing is easier than to step over the frontier between great nations. And in the moral world also the Rubicon is passed, the destiny of a soul is fixed, sometimes without a struggle, unawares.
Instead of spiritual conflict, there was intellectual curiosity. "Pharaoh sent, and behold there was not so much as one of the cattle of the Israelites dead. But the heart of Pharaoh was heavy, and he did not let the people go." This inquiry into a phenomenon which was surprising indeed, but yet quite unable to affect his action, recalls the spiritual condition of Herod, who was conscience-stricken when first he heard of Christ, and said, "It is John whom I beheaded" (Mark vi. 16), but afterwards felt merely vulgar curiosity and desire to behold a sign of Him. In the case of Pharaoh it was the next step to judicial infatuation. When Christ confronted Herod, He, Who had explained Himself to Pilate, was absolutely silent. And this warns us not to think that an interest in religious problems is itself of necessity religious. One may understand all mysteries, and yet it may profit him nothing. And many a reprobate soul is controversial, acute, and keenly orthodox.