My answer: Don’t think that The Zohar was written to serve as an ordinary book to tell or explain something to us. This isn’t the case. Baal HaSulam wrote his commentary for a different reason as well. We don’t study using our earthly mind to comprehend what is written and to learn in detail how to work in the three lines by memorizing all the terms. We must understand the necessity for correction and not the structure of it all.
The additional commentaries on the authentic sources provided by the Kabbalists (on the Kabbalistic works of the Torah, the Prophets, and other sacred texts) are impossible to comprehend through the ordinary, external mind. They can only be comprehended through correction of the soul. Therefore, all Kabbalistic commentaries are primarily designed to draw the Upper Light onto the student. Then, the reader can use the sources correctly, enjoy the light contained in them, and, along the way, discover what is written in the books. This is what is called commentary.
Every commentary is an additional instrument that helps us to connect to the authentic source, not to just understand it. When we are reading Baal HaSulam’s so-called “technical” explanations about the three lines, Sefirot and Partzufim, ascent and descent, and Reshimot and screens, we think that he is trying to teach us some regular science for us to learn with our brain and to be able to draft all this schematically. But, this is not the case.
Baal HaSulam’s addition, “The Sulam Commentary to The Book of Zohar,” helps us to draw the Light that Reforms. Its purpose is not to give us abstract knowledge of the structure of some higher world. It is impossible to know the Upper World until we are able to perceive it within our souls. Essentially, we are studying our own construction.
A person begins to sense that the entire reality, all of creation, is enclosed within him, not outside of him even though it appears to be external. Therefore, we must tune ourselves into studying correctly with an understanding that we will gain nothing but the Light that Reforms. After this, attainment will follow, and “the soul of a person will begin to teach him.” First, we must receive this soul, the spiritual substance, in which we will discover all the phenomena about which The Zohar speaks.
From the 1st part of the Daily Kabbalah Lesson 6/23/10, The Zohar