If you don't know what a soul is, and you think it's something people just make up, then you are missing out on the experience of being human and you have a bigger problem than not being able to understand what art is.

Is it this fuzzy blob of ineffable experiences, aesthetics, qualia, self-reference, dualism, spirituality and other things? I don't need to reject all this to notice that its fuzziness makes it impossible to operationalize.