The joining of MaH and BaN through these interconnections is the true root of the entire governmental order. However, it is impossible for this root to be revealed. Quite the contrary, the entire government depends on the concealment of this root. For then men act on their level in accordance with their freedom of choice while the Holy One, blessed be He, carries out His plan. For the concealment itself is what brings about the repair. Accordingly, there is on the one hand the order whose function the Holy One, blessed be He, displays: this is the order of Atzilut with its various Partzufim. On the other hand, there is the concealed root which lies in the way MaH is joined with BaN, and this is not known.
The Concealed Root Where MaH and BaN Join Together
Kalach Pitchei Chokhmah 81:2