The Eastern Lightning testifies that God has incarnated in the last days to do the work of judgment Himself. And yet God's work in the Age of Law was done by using Moses. So can't God's work of judgment in the last days be done in the same way, by using people? Why does God need to incarnate and do it Himself? Almighty God says, "The work of judgment is God's own work, so it must naturally be done by God Himself; it cannot be done by man in His stead. Because judgment is the conquering of man through the truth, it is unquestionable that God still appears as the incarnate image to do this work among men" (The Word Appears in the Flesh).
The answer from God’s word:
When Jesus came, He also did part of God’s work, and spoke some words—but what was the main work He accomplished? What He mainly accomplished was the work of crucifixion.