The Mental Powers of Zeir Anpin are founded on Kindness-Judgment-Mercy… Since Chessed-Gevurah-Tiferet and Netzach-Hod-Yesod are arranged in the columns of Kindness-Judgment-Mercy, the factors governing them – the Mental Powers – are also arranged in the same way.
…for these make up the entire cycle of government. The reason Zeir Anpin and his governmental order are founded on the basis of Kindness-Judgment-Mercy is that this is what is required for the entire cycle of six thousand years, the period of service.