קבלה אויף נחום 1:2

You thus have learned that the Great Name HaShem-יהו״ה, blessed is He, is central and includes both kindness-Chessed and judgment-Din. About this the sages stated in Pirkei Heichalot,³⁹¹Pirkei Heichalot, Braita d’Maaseh Merkavah Ch. 7 “To His right is life and to His left is death.” Now that you know this, understand how all the names, titles and qualities, adhere to the Name HaShem-יהו״ה, blessed is He. About this Sefer Yetzirah states,³⁹²Sefer Yetzirah 4:3 “The Holy Chamber (Heichal HaKodesh-היכל הקודש) is positioned in the center [and carries them all].” This refers to the secret of the Name HaShem-יהו״ה, which is central to all the names, whether those above it, those below it, or those to its sides. This is the secret of the verse,³⁹³Kings I 22:19 “I saw HaShem-יהו״ה sitting on His throne, [with all the hosts of the heavens standing by Him, to His right and to His left],” with all the names and titles, through which He actualizes His actions. According to the action that He wants to affect, He garbs Himself in the name or title that is appropriate for that action. Always remember this important principle. That is, sometimes you will find HaShem-יהו״ה being called merciful-Rachum-רחום, and at other times you will find Him being called jealous-Kano-קנוא, vengeful-Nokem-נוקם, wrathful-Baal Cheimah-בעל חימה, or a man of war-Ish Milchamah-איש מלחמה, as written,³⁹⁴Nahum 1:2 “HaShem-יהו״ה is a jealous-Kano-קנוא and vengeful-Nokem-נקם God; HaShem-יהו״ה is vengeful-Nokem-נקם and wrathful-Ba’al Cheimah-בעל חימה.” It similarly states,³⁹⁵Exodus 15:3 “HaShem-יהו״ה is a man of war-Ish Milchamah-איש מלחמה.” However, if He is completely merciful-Rachamim, how could scripture say such titles of harsh judgment about Him? Rather, those titles on the side of judgment-Din that we discussed, which are intermingled with the quality of mercy-Rachamim, adhere to Him. That is, they adhere to Him according to what is appropriate and He manifests within them.