We have to be careful how we interpret Paul. Paul is not speaking of a literally spiritualized body. This was a term that Paul used to mean glorified. Christ’s glorified body was fully physical. We see this in the latter parts of the gospel and early references in Acts refer to Christ eating. This was deliberatey inserted by the writers to make it clear that Christ was not a spirit, but a physical person.
That being said, this person had glorious attributes, such as the ability to pass through walls and make himself appear and disappear at will, such as the when he meets the apostles on the road to Emaus. He does a very physical act, he breaks bread with them and then disappears.
What is interesting in the story of Emaus is that they recognize him in the breaking of the bread, which Jesus had fortold in John would be the sign or proof of his divinity. Observe that they don’t recognize the stranger who is walking with them. They recognize Christ in the bread that he gives them, which is the Eucharist he then becomes visible to them, only through the bread.
Therefore the bread was not ordinary bread. The stranger who hid his identity from visual recognition revealed his identity through the bread. This is the promise that Jesus had made in John 6.
JR