Likutei Moharan 74:12/ליקוטי מוהר"ן ע״ד:י״ב

112. Nevertheless, each individual must see to mitigate this judgment, because judgments are from the aspect of constricted consciousness. Every person must progress from constricted to expanded consciousness, and by doing so mitigate judgment, the aspect of Yitzchak. YiTZChaK corresponds to judgment, the aspect of [the Holy Name] Elohim, as it is written (Genesis 21:6), “Elohim has brought me TZChoK (laughter).” For Yitzchak was born to Sarah, who corresponds to Malkhut, as Rashi explains: She was named SaRah sheh’SaRah (since she ruled) over the entire world (Genesis 17:15, based on Berakhot 13a). And Malkhut is judgment, as in: The judgment of the malkhut is judgment (Gittin 10b) .

2Judgment is strongest when it is in the aspect of constricted consciousness. It is then that the malkhut is called tzedek (justice), as is known. For TZeDeK is MaLKhut of Holiness (Tikkuney Zohar, Introduction, p.17b), the aspect of “MaLKi-TZeDeK, the MeLeKh (king) of Shalem” (Genesis 14:18). And when Malkhut corresponds to tzedek, constricted consciousness/judgment prevails. This is the source of the judgment associated with Yitzchak, the aspect of darkness, as in “[Yitzchak’s] eyes grew dim and he could not see” (ibid. 27:1), which is the aspect of night, as in “and the darkness He called night” (ibid. 1:5). Thus it also corresponds to the soul, as in “My soul longs for You in the night” (Isaiah 26:9) .