Exodus 10:27 But the Lord hardened Pharaoh's heart, and he would not let them go. 28 And Pharaoh said unto him, Get thee from me, take heed to thyself, see my face no more; for in that day thou seest my face thou shalt die. 29 And Moses said, Thou hast spoken well, I will see thy face again no more.
[Patriarchs & Prophets pp 271>272] The people of Egypt were ready to despair. The scourges that had already fallen upon them seemed almost beyond endurance, and they were filled with fear for the future. The nation had worshiped Pharaoh as a representative of their god, but many were now convinced that he was opposing himself to One who made all the powers of nature the ministers of His will. The Hebrew slaves, so miraculously favored, were becoming confident of deliverance. Their taskmasters dared not oppress them as heretofore.
Egypt there was a secret fear that the enslaved race would rise and avenge their wrongs. Everywhere men were asking with bated breath, What will come next? Suddenly a darkness settled upon the land, so thick and black that it seemed a “darkness which may be felt.” Not only were the people deprived of light, but the atmosphere was very oppressive, so that breathing was difficult. “They saw not one another, neither rose any from his place for three days: but all the children of Israel had light in their dwellings.”
The sun and moon were objects of worship to the Egyptians; in this mysterious darkness the people and their gods alike were smitten by the power that had undertaken the cause of the bondmen. Yet fearful as it was, this judgment is an evidence of God's compassion and His unwillingness to destroy. He would give the people time for reflection and repentance before bringing upon them the last and most terrible of the plagues.
2nd Peter 3:9 The Lord is not slack concerning his promise, as some men count slackness; but is long-suffering to us-ward, not willing that any should perish, but that all should come to repentance.
May God add His blessing to the study of His word. "Good night" and God bless!