What does Exodus 10:23 mean?
God has brought intense disasters on the nation of Egypt (Exodus 7:21; 8:6, 17, 24; 9:6, 10, 24; 10:14). Each has come because Egypt's king, the pharaoh, has refused commands to release the Hebrew slaves (Exodus 5:1; 7:16; 8:1, 21; 9:1, 13; 10:3). Instead, he has been stubborn and prideful (Exodus 5:2; 7:13–14, 22; 8:15, 19, 32; 9:7, 35; 10:20). Each plague also suggested that the Egyptian idols thought to control certain aspects of nature were helpless against the God of the Israelites. This ninth event is an overt challenge to one of Egypt's most important deities: the sun god, Ra.The prior verse used two separate words to amplify the darkness which came over Egypt. Here, it is said that the people stayed in their homes for three days and "did not see one another." A common interpretation is that this darkness is a supernatural blinding, preventing even the use of artificial lights. But this uses a word that can also be translated as "behold," "regard," or even "appear." Many commentators note that sandstorms can almost completely block out sunlight. An earlier plague involved lethal hail and lightning (Exodus 9:24–25). So, it's possible the people of Egypt huddled in their homes, too afraid to come out. These constant disasters are not only ruining Egyptian life, but they are also eroding trust in their Pharoah (Exodus 11:3)
More important is the meaning of the plague of darkness. The Lord adds even greater emphasis to His attack on Egyptian idols by keeping it from affecting His people in Goshen (Genesis 47:27; Exodus 8:22; 9:26). Scripture does not record any appeal from Pharaoh or prayers by Moses, so this plague may have come and gone without the two men speaking to each other.