Redemptive Eating

Eating carries great theological significance in Scripture. Human beings were not designed to be self-sufficient and self-sustaining. We are contingent creatures, dependent at every moment upon the God who created and sustains us. There is no biblical warrant for believing that will change once we are glorified. We will not cease to be human. God is not saving His people from the physical realm but redeeming them from the curse. His purpose is not to do away with the material world but to renew it and free it from the corruption of sin. The problem is not the physical realm but living as if that realm is all there is. Therefore, the question of whether or not we will need to eat in our glorified state misses the point. The problems of the curse will be gone. In the new heavens and the new earth, there will be abundance. The new heavens and earth will truly be the land flowing with milk and honey.
Human beings, created in God's image, were made to participate in two realms simultaneously, the physical and the spiritual. This is essential to the full and complete expression of our humanity. We were made to be sustained by God in both realms (man shall not live by bread alone but by every word that proceeds from the mouth of God). In the Garden, God provided food for the body and communion with Him for the spirit. But man sinned in eating, choosing to disregard God's Word (spiritual nourishment) in favor of the forbidden fruit. He died spiritually and was cast out of the place of God's presence.
Just as humanity fell through disobedient eating, God determined that redemption would come through obedient eating.