...had to be progressively repaired little by little. Here again we have the principle of gradation. For the Supreme Will did not want complete perfection to be revealed all at once, but rather, little by little. This is what provides a place for men to acquire merit.
Part 2: This includes both the descent of the hind parts of Abba and Imma and the breaking of the other Sefirot... For the breaking of the seven lower Sefirot is a deficiency in the roots of the separate creations, while the descent of the hind parts of Abba and Imma is a deficiency in that which repairs those roots. Together they make up the totality of all the damage, and both must be rectified. Both were repaired together, for the repair comes at one and the same time: as one was repaired, so was the other. For if the three first Sefirot continually repair the seven lower ones, it follows as a matter of course that the latter are constantly reaching better states of repair. Conversely, if the seven lower Sefirot are constantly reaching better states of repair, this signifies that there is no deficiency in the radiation of the first three Sefirot, which bring about their repair.