The third reason why the flow of influence must be a combination of Kindness and Judgment is that the creations themselves include some that emerge from, display and reveal the root of Kindness while others derive from and allude to the side of Judgment. Both must exist continually. Even in a single creature, there are aspects that stem from the side of Kindness and aspects that stem from the side of Judgment. The same applies to MaH and BaN, as discussed earlier. Every creation must be a combination of these two factors, and each root must influence and sustain its offshoot.
The Building Blocks of Judgment and Mercy
Kalach Pitchei Chokhmah 72:8