…is that Arich Anpin is rooted in the mystery of complete beneficence, for Arich Anpin only bestows good. Arich Anpin is as it will be in the end, when there will be only good. Thus Arich Anpin’s only purpose in all aspects is to bestow good through the mystery of the unity that brings all evil back to good. The Sefirot themselves contain this aspect (of Arich Anpin clothed within Zeir Anpin) in order for the world to survive. For if the governmental order had not been built on this but instead the world had been governed only in the mode of Justice through the Sefirot, it would not have been able to endure because of the wicked.
Arich Anpin's Transgression
Kalach Pitchei Chokhmah 92:12