Yesodis called “All” (kol) because all of the supernal attributes are included in it. It unites them all and shines [them] into Malchus, which is called “the Bride” (kallah) for the same reason, that all the attributes are also included in her.⁶, which corresponds both to the Sefirah of Malchus and to the last letter heyof the Tetragrammaton. Malchus, like Yesod, is also a microcosm of the entire Sefirotic realm. However, Malchus is feminine and receptive, whereas Yesod is masculine and imbuing. Likewise, the Tzaddik unites all the attributes, as I wrote on the verse: “....who can go out before them, and come in before them,” in the name of my Master. *Toldos Yaakov Yosef, Lech Lecha,*p. 19b

footnotes: ⁶ The words “All” – Kol, כל, and the word “Bride” – Kallah, כלה, share the same root - kaf lamed. However, the word Kallah has an additional letter hey