Zeir Anpin must be complete with all his Mental Powers… The repairs must suit the deficiencies they come to rectify, while the deficiencies in any given light correspond to its unique functions. Since Zeir Anpin is the ruler and giver of influence, it is precisely the power of government and influence – the Mental Powers – that must be complete in him.
…and all the higher Partzufim bound to him to adorn him. In essence the service of the lower creations reaches only to Zeir Anpin, but its effects reach even to the Partzufim above him – Abba and Imma and Arich Anpin. This is because they repair and adorn Zeir Anpin with Mental Powers in order to perfect his function of sending influence. This they can only do to the extent that the lower creations are fit to receive the influence.