Answer: It was only so that humanity would not be confused. In our time, if people read a book of Kabbalah, they will not understand anything in it because in order to understand it, a person must ascend to a higher level and begin using the forces that operate there. Therefore, the Kabbalists hid their books.
There is no reason to reveal what nature itself hides. For example, nature revealed its nuclear energy 2,000 years ago, but it was only in the last century that people began to use it. Imagine what would have happened if that had occurred earlier!
Question: To balance the egoism, one needs to attain the positive force in nature. How does one discover it?
Answer: It is only if he acts according to the integral system: working in a group, nullifying himself toward the friends correctly, and studying the wisdom of Kabbalah together with them. In that way, he awakens and invites upon himself the influence of that positive force concealed in nature.
In our world, everything is based upon mutual cooperation between plus (the positive force) and minus (the negative force), but the plus level of human nature is concealed; we must get it from nature. To do this, a person must long to attain the positive force.
This is possible only if a person maintains all the conditions that I indicated earlier. Then he arouses the revelation of the positive force on himself. Through balancing it with the negative force, he builds himself.
From the Kabbalah Lesson in Russian 7/3/16