It is upon the readers to memorize the meaning of these words thoroughly, for it is impossible to repeat them every time (Baal HaSulam, The Study of the Ten Sefirot, Chapter 1, Part 1, Restriction and Line).
Comment: Baal HaSulam also wrote a dictionary of definitions of Kabbalistic terms. He recommended that we memorize them so they do not need to be repeated every time.
My Response: The fact is that we cannot take any wise, pure person, no matter by what selection criteria we use, and explain to him or her what the upper world, the world of infinity, light, and being filled with light are. It is impossible. A person must come to such explanations on their own in the process of long-term work on oneself.
Therefore, Kabbalistic books seem so incomprehensible in the beginning that there is nothing to grasp onto.
But as a result of reading them, a person who studies Kabbalah begins to be influenced by the upper light, which is located in the created place (practically, this is a desire). Under the influence of this light, he gradually begins to feel what all this is about.
Thus, gradually he approaches the state when he can, in general, begin to imagine and quite correctly what this place is, what the filling of the place with the upper light is, which the great Kabbalist Ari really wants to tell us about.
From KabTV’s “The Study of the Ten Sefirot (TES)” 8/14/22