The text contains a semiotic argument, in the form of questions and answers, which explain that it is not a glass of water, but “a full-grown oak tree,” created “without altering the accidents of the glass of water.” The text defines accidents as “The colour, feel, weight, size…”. The text includes the statement “It’s not a symbol. I have changed the physical substance of the glass of water into that of an oak tree. I didn’t change its appearance. The actual oak tree is physically present, but in the form of a glass of water.” and “It would no longer be accurate to call it a glass of water. One could call it anything one wished but that would not alter the fact that it is an oak tree.”
The work makes the same claim as the Roman Catholic doctrine of Transubstantiation and the Real Presence.