Deep question! Lots of theology to unpack in its answer…
Soul is purely spiritual; it does not have physical dimensions.
Agreed. Yet, ‘soul’ is present in a person (human or divine). If Christ is truly present in the Eucharist, then His soul is likewise present (albeit not physically).
Divinity is abstract, also spiritual, referring to God’s nature as God.
I think that I would quibble – divinity isn’t ‘abstract’. More to the point, though, I think that the definition of the Eucharist – as Christ present “body, blood, soul, and divinity” – isn’t speaking to a ‘spiritual’ reality (as you suggest) but a ‘metaphysical’ one. In other words, it’s an affirmation that Christ isn’t present merely in His humanity, but in His divinity as well. That is, we can’t separate the two, as if only the ‘human’ Christ is present in the Eucharist but the ‘divine’ Christ is not.
So when the wafer of bread moves from the priest’s hands to the Christian’s mouth, is it proper to say that soul and divinity moved from the priest’s hands to the mouth – from one location to another?
I’m not quite sure what you’re getting at, here. Is this another way of asking whether Christ (body, blood, soul, and divinity) is present in the Eucharist, whether in the priest’s hands or in the communicant’s mouth? That question seems somewhat trivial on its face: when you give me a chicken nugget, it moves from your hands to my mouth. Is there more to your question? Are you asking whether ‘soul and divinity’ has the property of physical location? That’s not any different than asking whether, when you hand a baby from you to me, if his ‘soul and humanity’ move from you to me. There’s not really any philosophical question being asked here. (Unless, of course, you’re asking whether ‘soul’ has physical extension – which, as it were, isn’t a question whose answer changes when you’re talking about the Eucharist… right?)
If so, how, if spirit is not measured?
How does one ‘measure’ (empirically – that is, physically) something that is not physical?