Continuing on our sacred journey, we will now explain the difficult task that Moshe Rabeinu faced—going to war with Amalek. The Torah tells us that Moshe instructed Yehoshua (Shemos 17, 9): "בחר לנו אנשים וצא הלחם בעמלק, מחר אנכי נצב על ראש הגבעה ומטה האלקים בידי"—choose men for us, and go out to do battle with Amalek; tomorrow I will stand on top of the hill with the staff of G-d in my hand. Why did Moshe exert himself to stand on top of the hill? Based on this discussion, we can suggest that Moshe Rabeinu perceived via his incredible kedushah that in order to combat Amalek, it would be necessary for him to elevate his “madreigah” to the “sha’ar hanun” of kedushah at least temporarily.
This is the implication of his statement: “Tomorrow I will stand on top of the hill.” This also explains why (ibid. 12): "וידי משה כבדים"—Moshe’s arms grew heavy. It was difficult for him to rise to the “sha’ar hanun”—a level that he had not achieved previously. Therefore, he required the assistance of two tzaddikim: “And Aharon and Chur supported his hands, one on this side and one on that side.” With their help, he managed to rise above his actual “madreigah” and achieve the “sha’ar hanun.”
To explain how Moshe Rabeinu accomplished this superhuman feat, let us refer to HKB”H’s statement (Yeshayah 51, 4): "כי תורה מאתי תצא"—for Torah will come forth from Me. They expounded on this passuk in the Midrash (V.R. 13, 3): HKB”H said: “A new Torah will come forth from Me”—novel aspects (chiddushim) of the Torah will come forth from Me. Our sacred sefarim teach us that this refers to the “sha’ar hanun” that has not yet been revealed to the world but will only be revealed le’asid la’vo. In order to combat Amalek, however, Moshe Rabeinu climbed to the “top of the hill.” Thanks to his incredible kedushah, he drew the “sha’ar hanun” from the future geulah. This enabled Yisrael to overcome the “sha’ar hanun” of tumah—the klipah of Amalek.
