Kabbalah sa Genesis 18:12: Sha'arei Orah

This Sefirah is called Eden-עדן, meaning that it is the inception of the spreading forth of Thought-Machshavah-מחשבה from the source from which all the Sefirot were revealed from the Supernal Crown-Keter Elyon. This then, is the wellspring-Ma’ayan-מעיין and source from where all novel beings in existence are brought into existence by the revelation of the Sefirot from the Supernal Crown-Keter Elyon. The word “Eden-עדן” indicates a source from which something is drawn. This is the secret of the verse,²³⁶Genesis 2:10 “A river-Nahar-נהר went out of Eden-עדן,” indicating that the river-Nahar-נהר comes out of the source and wellspring-Ma’ayan-מעיין.²³⁷Also see Shaar HaYichud of Rabbi Dovber of Lubavitch, translated as The Gate of Unity, Ch. 1. This then, is the meaning of “Eden-עדן,” as indicated by the matter of Sarah. When the source ceased from her and then returned, she said,²³⁸Genesis 18:12 “After I have withered, shall I again be rejuvenated-Ednah-עדנה,” meaning, “Shall the source be renewed for me?”