Petach 80 starts off by reiterating a point made earlier on  to the effect that all the various sorts of defects, acts of wrongdoing and injustice, and the like that could possibly exist are rooted in BaN. And all the various sorts of Tikkun, acts of righteousness and justice, and the like for those defects are rooted in the conjunction of MaH and BaN.
 See Petach 62 and 11:3 above as well as Klallim Rishonim 34.
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