Is art just something to make the world prettier?
Is it to show off?
What would a work of art mean to you if you'd never seen any sort of art before?
Is the point of art to bind groups of people together? Provide a focus for worship? Let you step into someone’s else’s reality? Let you discover a deeper reality of your own?
Because there always are deeper realities. Somewhere. Even if it's not in a world that's attached to this one in any sort of sane or normal way.
There are always deeper realities.
And sometimes, as became clear during the course of writing the novel, not realising that can be absolutely fatal.