Answer: Baal HaSulam had to reveal the system that governs our world. His Talmud Eser Sefirot, commentaries on The Tree of Life by Ari, The Book of Zohar, and other works formed the basis of his work.
But if we take the letters and articles of Baal HaSulam, they all talk solely about the process of attaining the Creator, which is the goal of studying the science of Kabbalah.
Spiritual attainment occurs only among the people who are engaged in creating a specific connection among each other. This connection must be similar to the ten Sefirot and that is why Baal HaSulam described it as The Study of the Ten Sefirot (Talmud Eser Sefirot).
As soon as people even minimally become similar to what is described as ten Sefirot, they immediately begin to feel the Creator in them. Meaning, these feelings are a sensor, a detector that reveals the Creator.
Remark: Once Baal HaSulam received a letter from one of his fellow citizens with a claim that Baal HaSulam defined a new structure, a new methodology.
Baal HaSulam replied with a long letter in which he stressed: “It seems that you have not sufficiently studied my words.” He noted that “when the people entered the land of Israel and there was no peace, it was impossible to expect that someone would fulfill the main commandment.”
In order for the Torah not to be forgotten, people began to engage in the rest of commandments, ignoring the most important one because they had no other choice. But the most important is: “Love your neighbor as yourself.”
My Comment: It is written in black and white. There is no way around it. And this is exactly what is missing. There is a void in all modern religions in fulfilling the commandment of love for one’s neighbor. That is why everyone, including religious figures and systems, hate Kabbalah because it puts emphasis on achieving love for one’s neighbor.
From The Lesson in Russian Language 9/10/17