Yup I know that and know that well. but our problem (as a species) is much more frequently hitting the target we aim for, just aiming for the wrong target.
Still, the sin of looking is not the same as the action of doing; not that it's any less sin. So to put this in context w/ the discussion here, it could show a Spiritual connection btw the elements of the Eucharist and Jesus' physical Body, but does nothing to say they're physically the same thing. Which goes right back to the weakness I've exposed in the stand by "accidents vs substance" argument.
If by 'substance' you mean a deeper reality than the mere physical existence, then we're in agreement and shouldn't be anathematizing one another. And this stance fits rather well with this, rather odd, analogy. It fits very well within the Bread and Wine, which is itself a beautiful analogy ...
Ortho, are you sick? Is that why you're here during working hours?