Everything we are presently discussing relates to the Mental Powers conferred by Imma, which are characterized by their differentiation into detail – and thus the Mental Powers conferred by Imma enter into Zeir Anpin in such a way that the nine joints into which Netzach-Hod-Yesod divide enter one by one in each year of immaturity (see Etz Chayim, Shaar Derushey HaTzelem 8).
This is not so in the case of the Mental Powers conferred on Zeir Anpin by Abba, which are characterized by their general nature. Thus in the teachings relating to Abba there is no mention either of the time of the entry of joints being governed by their number or of Daat of Abba extending through the body and returning up above as in the case of Imma. In the case of Abba the only differentiation is between the three overall Mental Powers, which enter in three years (between the ages of 15-18, after which Zeir Anpin receives the two encompassing lights of Abba by the age of 20). This is not so in the case of the Mental Powers conferred by Imma, where each detail is revealed individually during the years of Suckling up till 13 – time of the First Maturity – and in the first two years thereafter.