Can modern physics remove abstract ideas?
Abstract ideas are NOT finite.
Let's leave aside the "God/spirituality" example for the moment, since 1. I'll freely concede that such ideas are perfectly open to scrutiny and 2. I really want to avoid this becoming another fanatic-fest between believers and non-believers.
Let's instead adopt my first example...I don't believe in it myself, but it works here:
Love.
Now, you can give me a physical description of hormoes and pheremones and chemical reactions and all of that which cause attraction and the like...
But can you measure LOVE ITSELF, as unbelievably corny as that may sound?
Can you quantify how much, to what degree love exists between people, and quantify the nature of that love, make it soemthing finite?
What about freedom?
You can, again, give some physical definition of it, but at the same time, it's still an abstract ideal, "freedom," it's not entirely dependent upon, and thus not entirely open to, physical ideals.
Perhaps most classically of all...
"Goodness" and "Justice."
Plato devotes "Philo" to the former and an enormous section--if not even possibly the main focus of--"The republic" to the latter.
What is "Good?" You can give positive/negative chemical reactions as a partial answer, again, but the idea of goodness itself is SUBJECTIVE to a great extent and numbers are OBJECTIVE...
A 2 is a 2; no matter how much you might want to interpret it as such, 2 =/= 17.
And then there's justice.
What's justice?
How can you quantify THAT, finitely, with numbers?
Hence my statement that not everything is finite...
Finititude depends upon something being concrete, and so long as the abstract exists, even in part, not everything is finite.