Answer: The thing is that we need a language for explanations. After all, there are no words in the spiritual world and Kabbalists have to speak the language of branches, which confuses us.
The language of branches is good for those who already are in the spiritual world. If I am above the Machsom, I do not have a problem with understanding no matter the language of explanation. This is because I really feel this world, I understand it, and I perceive it on the level of the 125 degrees to which I have ascended. I will understand what is happening from the explanation the same way I understand a tale about this world with which I am familiar.
Even if I do not understand what this is, I can still somehow compare and gauge them. And this is very important. Even if I do not feel these concepts in my heart, I can at least separate them into levels in my mind: Reshimot Dalet/Gimel, Gimel/Bet, Partzufim AB, SAG, MA, BON.
Here everyone can be wise if he has studied the material. Even if he has not practically attained anything, he has at least learned the terminology and can explain himself. This is why it is so necessary for us and we would not be able to express anything at all without it. After all, Kabbalists must establish a certain connection with us in order to use it to bring the Reforming Light to us.
They need a certain thread that connects them with us to be able to constantly pour medicine into us through it. Otherwise we are unable to connect with them because they are in another world that is separated from us. We do not see the channels through which information flows to us.
Kabbalists create this channel by telling us about Partzufim AB, SAG, MA, and BON. And as we study them theoretically and establish an external connection with them, essentially without any understanding, but only obediently repeating words after them, in this way we express our desire to receive the medicine from them, the Light of correction, and this is why we receive it. But this connection is necessary.
If Kabbalists, instead of speaking the language of TES (Talmud Eser Sefirot – The Study of the Ten Sefirot), speak the language of the Tanakh, you immediately imagine that they are speaking about this world and that you understand everything. This is the entire problem, people do not understand that the legend pertains to the spiritual world, actions of bestowal (called the Holy Bina, the quality of bestowal), and they attribute it to this world, which begets all the religions and beliefs.
However, as the notions of the group, connection, and dissemination become closer to you, you will feel that the material in TES is becoming clearer. You will never be able to understand it purely theoretically with your mind. You can memorize all the words, but you will not advance past this. If a person wishes to advance through sensory attainment inside his desire, then he will not understand TES until he connects it with some already attained private correction of himself. Already before the Machsom, he will begin to perceive the inner meaning of the notions, and it will become easier for him to study.
When a person advances correctly, attainment goes from feeling to mind. This is why one does not need to have a big mind to learn. Theoretical knowledge is not connected to spiritual advancement in any way.
From the 3rd part of the Daily Kabbalah Lesson 5/16/12, The Study of the Ten Sefirot