What does Isaiah 8:22 mean?
The prophet Isaiah is describing those among God's people who have rejected His revelation. These are those who have rejected the truth of the Lord and the truth through the Law and His word. They remain unsatisfied, which is why some seek answers from the dead through illegitimate, dangerous means (Isaiah 8:19). The dead have no real answers. He has described those who reject the Lord as having no dawn, meaning that the light of truth never comes to them (Isaiah 8:20).Thus, they live out their lives in emptiness and darkness. Their hunger to know without knowing God leads to great frustration and anger (Isaiah 8:21). They shake their fists at both the Lord and their king. They raise their faces but see only darkness. Now Isaiah adds that when they look down to the earth, they will find no answers there, either. They continue to live in despair. The gloom envelopes their lives.
There is only one source of light, and He is the Lord. There is only on source of truth, also the Lord. Those who reject the Lord and remain hungry for light and truth will remain unfilled all their dark days.