Part 2: Accordingly all their different aspects are known in greater detail… The Kabbalistic writings enter into fewer details about the construction of Abba and Imma than in the case of Zeir Anpin and Nukva, where there is extensive discussion of their stages of immaturity and maturity, how many years these stages last and the details involved in the different states of the Partzufim – face-to-face, back-to-back and so on. The reason for this is because the higher Partzufim are only the indirect cause of our world while Zeir and Nukva are the immediate cause. Accordingly they contain aspects parallel to all that exists in man below in all their individual details. For if this were not the case, these aspects would not exist here below.