"A very weighty argument is this — namely, that neither does the light which descends from thence, chiefly upon the world, mix itself with anything, nor admit of dirtiness or pollution, but remains entirely, and in all things that are, free from defilement, admixture, and suffering. Besides, we must pay attention to the other kinds of phenomena, both to the Intelligible, and yet more to the Sensible — whatever are connected with matter, or will manifest themselves in relation to our subject."