God says, "The word of God cannot be spoken as the word of man, much less can the word of man be spoken as the word of God. A man used by God is not the incarnate God, and the incarnate God is not a man used by God; in this, there is a substantial difference" (). God has twice become flesh to do His work of redeeming and saving mankind, and both times there have been some people God has used who cooperate with the work of God incarnate. Both God incarnate and the people God uses possess a normal humanity and the work of , but how exactly do their substances differ? And how should we know the incarnate God? The answers are revealed in this short video.