 from the First emanates the existence of the Second, and this Second too is a substance which is not embodied at all and is not in matter, and it intellectually cognizes itself [or “its essence”] and it intellectually cognizes the First, and its intellectual cognition of itself is not something other than its essence; and by its intellectually cognizing the First there follows necessarily from it the existence of a Third, and by its being substantified by the essence which is specific to it there follows necessarily from it the existence of the first heaven. (Walzer 1985, 100)