Likutei Moharan 74:11/ליקוטי מוהר"ן ע״ד:י״א

111. This is the meaning of “Avraham begot Yitzchak” (Genesis 25:19). Avraham is lovingkindness. Yitzchak is strength, as in “the Dread of Yitzchak” (ibid. 31:42). In other words, holy judgment, which corresponds to Yitzchak, is born to and extends from Avraham, who is lovingkindness. For in truth, this judgment embodies great lovingkindness, because it is for his benefit, as in “those whom God loves, He rebukes,” as explained above.

2And this is the meaning of “with the saving strengths of His right arm” (Psalms 20:7). Clothed within the strengths and judgments is “the saving of His right arm,” the aspect of lovingkindness. This is because this judgment extends from lovingkindness, as in “Avraham begot Yitzchak.” It is also the meaning of “For His lovingkindness toward us has grown strong” (ibid. 117:2). The strengths are, in fact, kindnesses—so that through them, he might come closer to God, as explained above.