It is the same kind of belief as that we have about the physical universe. But there is something further. The spiritual reality is alive. Whatever the mystery of aliveness may be, it is no more mysterious when we think of it as a whole than when we think of it in an individual living being. Beauty lives in hearts that respond to it.
Justice is alive in generation after generation.
I confess that it seems to me most natural that we should call it God. It is the God from whom even the atheist cannot escape. I do not say that everyone recognizes this God. No, but we lived in the universe, too, for a long time before we called it that. Men breathed the air about them for millions of years before they knew that it was air.