Many years ago I occasionally hung out with a group of Jesuit scholars and a discussion similar to this one, physical vs spiritual, came up. Being a Smart-ass Mick teenager I announced that if you could not sense something with your 5 senses it had no physical presence and therefore did not exist. So there!
"Aha!" says one of the guys. (Note: I have learned that if you're arguing with a Jesuit scholar and he says "Aha!" you might as well pack up and go home right then.) "Do this," he said, "Show me two." When I held up two fingers he said "No, don't show me two of something, just show me two."
"I can't do that," says I.
"Right," says he, "But when I say two, you know exactly what I mean. The concept of two exists without any physical presence at all. And if that can be, what else can be?"
I think about that every once in awhile. Especially when the topic is life after death, or the existence of God. If that can be, what else can be?
ps That particular Jesuit went on to own a Ford dealership in ST. Paul MN. Thought you might like to know.