i've entertained that idea before, except, He proved that wasn't the case:
While they were still talking about this, Jesus Himself stood among them and said to them, “Peace be with you.”
They were startled and frightened, thinking they saw a ghost. He said to them, “Why are you troubled, and why do doubts rise in your minds? Look at My hands and My feet. It is I Myself! Touch Me and see; a ghost does not have flesh and bones, as you see I have.” When He had said this, He showed them His hands and feet. And while they still did not believe it because of joy and amazement, He asked them, “Do you have anything here to eat?” They gave him a piece of broiled fish, and He took it and ate it in their presence.
(Luke 24:37-43)
they thought He was a ghost/spirit -- but 'food for thought' He ate a fish to demonstrate He was there in the body