Exodus 10:23 KJV
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.
There are, in the plagues of Egypt, obvious types of the differences between the lost and the saved. None of those types is more wonderful than the plague of darkness.
For three days the land of Egypt was so dark that the Egyptians were bound to do nothing and go nowhere. Yet the Bible says the Jews had light in their dwellings. This light could only have been supernatural in character, as any other would have naturally extended to the Egyptians. It was a light that was effective but it was a light that was for one class of people alone.
There is a light in the world today that is only effective for the people of God all others are blind to it. They may hear that it exists and perhaps even wish for it but it only serves the saved. They may own its source, the Bible, just as an Egyptian would have owned a lamp, but the light that proceeds from the Word of God may only be seen by the saved.
One could presume that the Jews may have used that light for all sorts of evil.
· They could have looted the Egyptians
· They could have escaped their captivity
But they did not. Some scholars believe that they used this time to pack for their journey. Others believe they may have obeyed the ordinance of circumcision, which would no doubt have lapsed under the strain of slavery. Whatever they did, it was ethical and not illegal. So it is with the true light of God's Word. Those who have it could never and would never use it for advantage against those in darkness. It is impossible to possess this light and desire to use it illegally, unethically or to one's advantage over another.