I would like to present one more idea for the consideration of our esteemed readership. Based on this discussion, we can shed some light on a teaching in the Gemara related to Shemoneh Esrei (Berachos 10b): "המתפלל צריך שיכוין את רגליו, שנאמר ורגליהם רגל ישרה"—one who prays must align his feet, as it states (Yechezkel 1, 7): “Their legs were a straight leg.” Rashi explains: They appear to be a single leg. This, in fact, is the halachic ruling in the Shulchan Aruch (O.C. 95, 1).
I believe that we can explain the matter as follows: As we know, there are seven shepherds: Avraham, Yitzchak, Yaakov, Moshe, Aharon, Yosef, and David. They are aligned with the seven midos: Chesed, gevurah, Tiferes, netzach, hod, yesod, and malchus. Moshe Rabeinu, the fourth shepherd, aligns with the fourth midah, “netzach.” Whereas Aharon HaKohen, the fifth shepherd, aligns with the fifth midah, “hod.”
Based on the passage “Pesach Eliyahu” in the Tikunei Zohar (Intro. 17a), our sacred sefarim explain that the seven midos are arranged in the form of a human being. Chesed is the right arm; gevurah is the left arm; Tiferes is the body; netzach is the right leg and hod is the left leg; yesod is the extremity of the body where the holy Bris is located. According to this scheme, Moshe and Aharon represent the two lower extremities of the body of kedushah that transported Yisrael throughout their forty years in the midbar.
It is for this reason that “one who prays must align his feet” to appear as a single leg. We want to connect with the kedushah of Moshe and Aharon—the representatives of “netzach” and “hod,” the right and left legs—to make amends for our shortcomings related to “bein adam laMakom” through Moshe, and to make amends for our shortcomings related to “bein adam l’chaveiro” through Aharon. By doing so, we will merit having our tefilah ascend to HKB”H and be accepted with rachamim and divine goodwill by the Master of everything.
