Depending on the purpose, the properties of a Kabbalist souls, or he retires, and no one reveals that he Kabbalist, or, on the contrary, reveals itself to all, and as widely as possible, in order to attract students and education are Kabbalists. In this case, it creates a group of students. Group classes are preferred individual, when one studies one or two. As stated in the "Introduction to TES" p.155: "Around each engaged in Kabbalah, is formed around the light that purifies and prepares the man to the internal perception of the Upper Light." The intensity of the ambient light depends on the desire to understand the human being studied. You probably pay attention to the fact that when a person in the company, he was imbued with the fact that the interests of others.