Kabbalists are convinced that all people have to study the Science of Kabbalah. If they do not do it in this lifetime, they will have to come back to this world again and learn this science. What is specific about the Science of Kabbalah? Why is it that people have to master this science and if they did not, their life was not worth living? Why does the perfection of a human being depend on the knowledge of Kabbalah?
In order to understand it we have to accept the Kabbalistic method of definition – “The incomprehensible is not described” (no names are given to things that cannot be identified). We are talking here about things that are beyond our comprehension, the essence of the Higher Power, for instance. Kabbalists even refuse to discuss theoretically, try to identify or name it. That is why, when Kabbalists talk about the Higher Power, they do not mean its essence; they mean the Light that is coming from it. “Infinity” in Kabbalah is light emitting from the essence of the Higher Power. Kabbalistic scholars defined the Light coming from the Creator towards its creation as infinite and named it “Infinity.”
Courtesy of http://www.youtube.com/watch?v=Hw2vBYBE24Y