In Unsaneh Toqef, we find the following as part of the description of what the high holidays are like in heaven. “And a great shofar will be blown, and a small still voice will be heard, and the angels will be atremble, and panic and fear will grip them, and they will cry ‘Here is the day of judgment!'” The “small still voice”, the “qol demamah daqah” is a quote from Melachim I, from a lesson Hashem teaches Eliyahu hanavi. First the prophet is buffeted by a powerful wind, and G-d says, “I Am not in the wind”, then he hears a loud crash, “I Am not in the crash”, then a fire, and G-d says that He is neither there. Then “a small thin voice”. What sets the angels in panic? Not the great and mighty shofar, but the response within the human soul. What forces them to proclaim the day of judgment? Not the clarion call announcing that now is “He can be found”, but the person seeking Him, returning to G-d so that He will return to them.
Moshe rabbeinu’s first recorded prophecy, his sight of the burning bush, has a similar lesson.
2: And Hashem’s angel appeared to him in a flame of fire from the midst of a bush; and he looked, and, here! the bush burned with fire bo’eir ba’eish, and the bush was not consumed.3: And Moshe said, “I will turn aside now, and see this great sight, madu’ah lo yiv’ar haseneh — why the bush does not burn.”
4: And when Hashem saw that he turned to look, Hashem called him out of the midst of the bush, and said: “Moshe, Moshe!” And he said: “Here I am.”
In pasuq 2, a mal’akh appears to Moshe, and the bush is bo’eir ba’eish. However, Moshe turns aside from that vision. He turned to see that lo yiv’ar hanseh — no, it’s not really burning. There is a fire within the bush, only at the core. The mal’akh speaks mitoch, from within the bush. The truer revelation that Moshe rabbeinu saw beyond the angel was one if tzimtzum, Divine Constriction. When Moshe realizes this, the nevu’ah is elevated from a prophet’s speech to an angel to Moshe’s unique ability to speak “face to ‘Face'” with G-d. Moshe merited this nevu’ah because he was “anav mikol adam — more modest than any other man.” His anivus is a reflection and imitation of that very tzimtzum, which is how Moshe alone would turn to take another look.
The mal’akh appeared in the big, the flashy. The first glance made it seem that the whole bush was aflame. It’s like the shofar gadol blowing, announcing Hashem’s presence. The angel declared behimatz’o — here and now Hashem could be found. But Moshe’s response one to the qol demamah dakah, he saw Hashem limiting his presence to allow for a response, to demand derashah — seeking Him out. Realizing that you must respond, that you aren’t simply entitled, that is anivus. And therefore Moshe connected to the A-lmighty in a way no one else did before or since.