Likutei Moharan, Part II 7:9/ליקוטי מוהר"ן·תנינא ז׳:ט׳

19. And one has to mesh together the worlds, the upper with the lower and the lower with the upper. The son should incorporate the element of disciple, and the disciple should incorporate the element of son, in order that they should possess fear of Heaven.

2This is because the son is synonymous with the insight of mah, as in “Mah did you see?…” That being the case, he will not have any fear of God, since he is never witness to the Blessed One’s glory. The son must therefore incorporate an element of disciple; to reveal to the concept of son also a bit of the disciple’s insight, i.e., that “the whole earth is filled with His glory,” in order that he should possess fear of God.

3The same applies to the disciple, whose insight is “the whole earth is filled with His glory.” That being the case, he is in danger of ceasing to exist. It is therefore necessary to show him a bit of the son’s insight, i.e., the concept of mah , so that he does not cease to exist but instead possesses fear of God.