Part 3:...and all the Partzufim are bound up with one another... The innovation brought about through the repair was precisely that all the levels join together to produce their effects with one accord, so they can properly be called by the name of Father and Mother, Son and Daughter, which was not so in the case of the Primordial Kings, which were called only Chessed, Gevurah, Tiferet and Malchut (i.e. they are referred to as Sefirot but they were not Partzufim).
The reason is that there was no interrelation between them. In the repair, however, a complete interrelation was produced. Thus Binah is also related to Chochmah as its Nukva, and indeed, it is impossible for Chochmah to function except with Binah, or for Binah to function without Chochmah. The same applies to Zeir Anpin with the Nukva.
Likewise, the relation betwen Zeir and Nukva on the one hand and Abba and Imma on the other is like the relation of children to their parents.