Like justness in a judge's decision, or beauty in a painting, soul is a quality of absoluteness in something relative. Understood profoundly, people are connected to the holiness of the world in such a way that they reveal a dimension of holiness in themselves, a dimension of depth that is absolute.
Prayer is sitting in the silence until it silences us, choosing gratitude until we are grateful, praising God until we ourselves are a constant act of praise.