Baal HaSulam, The Writings of the Last Generation: People imagine that a person who has contact with the Creator is a person … nature, and that they should fear speaking to Him, much less be in His immediate vicinity. It is human nature to fear anything outside the nature of creation. People are also afraid of anything uncommon, such as thunder and loud noises.
People commonly believed that you experienced a certain anxiety when near a Kabbalist. I remember when I was started studying Kabbalah and began driving from Rehovot to Jerusalem to the Kabbalist named Isaac Zilberman, I was told: “You are going to see a person whom it is impossible to stand next to without trembling.” I did not experience anything like that.
A Kabbalist never reveals himself in anyway. On the contrary, he deliberately behaves simply. Even when there is a kind of “gilding” that appears about him, he immediately tries to dismiss it because it greatly hinders spiritual work. Nothing supernatural comes from him to make others tremble in his presence.
We see this in the writings of Kabbalists. For example, the students of Baal Shem Tov went to the people and they did not stand out from the masses. It was then that fables were created about them, but basically they behaved as very simple people.
Even though they sensed the upper world, the system of control of all nature, they nonetheless behaved like ordinary people. This was not difficult for them to do because the higher a person is, the simpler he behaves.
From KabTV’s “The Last Generation” 10/9/17