The proposition consists of two parts. Part 1: Until… The place of service is from Atzilut and below. Part 2: Therefore, since… How the service ascends to eternity, which is the level of the reward.
Part 1: Until MaH and BaN… The phenomena of breaking and repair are found only in BaN. For even though there was a certain aspect of concealment on the level of the Akudim (the lights of the Mouth of Adam Kadmon), this was not because of any breakage. Rather, it was a process brought about in order that it would afterwards be possible for the breakage to occur in the Nekudim (see Opening 33).