Answer: How can you know that he is a true Kabbalist? He cannot show you any specific diploma or perform miraculous acts that would look spiritual to you since how do you know what spirituality is anyway? Hence, you can only listen to your heart and examine whether what you hear resonates with you, connects you to the root of your soul.
I studied in five or six places before I found Rabash. And I used to leave them not because I would find something better; I just saw that there was nothing else to do there, nothing else to learn. And it isn’t because their intent was to deceive me; it’s just that each of them had their own method, ideas, and delusions.
But I was seeking a place where I could study Kabbalah as a science. And when I met Rabash, I immediately saw that his students studied authentic primary sources: The Zohar, the works of the ARI and Baal HaSulam, which are the most fundamental Kabbalistic texts, and that he attached deep meaning to the concepts in a logical form, without external religious acts or meditation.
In other words, he used a strictly scientific approach without shifting to one or the other side. By then, I had already realized that everything else has nothing to do with truth. I had a sense that wherever they talk about some actions related to the corporeal body or fantasies, it doesn’t have anything to do with spirituality.
I had a very clear feeling that here there was some entrance into a more internal world that doesn’t depend on the body or imagination, on all those attributes I have at the moment. It is required that a person reveals a certain internal layer within, and I was searching: How do I do that? And when I came to Rabash and started to study, I saw that that’s exactly about what he was speaking.
Baal HaSulam writes that anyone who wishes to receive spiritual knowledge must find himself a teacher, an authentic sage-Kabbalist who seems to be right for the job. But if he feels that he is in a place which doesn’t suit him, he shouldn’t stop looking. After all, time is running out.
From the 4th part of the Daily Kabbalah Lesson 2/13/2011, “The Essence of the Wisdom of Kabbalah”