Likutei Moharan 81:2/ליקוטי מוהר"ן פ״א:ב׳

12. This is the explanation of the [opening] verse: {“Go up zeh (this way) into the Negev, and you shall ascend the mountains.”}

2Go up—That is, you, the unlearned public, ascend.

3zeh into the Negev—Zeh alludes to the tzaddik. This is as it is written (Ecclesiastes 12:13), “for zeh (this) is all mankind,” and our Sages, of blessed memory, expounded (Berakhot 6b): The entire world was created only as an accompaniment for zeh (this one). In other words, the tzaddik is “into the Negev”—i.e., “the inferior part of the Land of Israel,” ordinary conversations—and this enables him to bind you.

4and you shall ascend the mountains—This refers to daat, as explained above.