Answer: A Kabbalist passes through states like these every day! This is on every level! In The Book of Zohar, they describe the difficult states that Rabbi Shimon and his great companions went through when they wrote this book.
Likewise, I saw states like these that my teacher went through. When he was in a state like this, he could not move or open his eyes. He didn’t have any strength; it had left him!
There is no Kabbalist, not even the greatest, who hasn’t experienced daily opposing states on the way, from the greatest minus to the greatest plus. Specifically with their help, he advances in the right and left lines, like walking with the right and left legs.
People going in the path of truth go through states like these because it is impossible to achieve a new, higher level unless we first feel its emptiness.
All knowledge is built on a comparison between darkness and light, so the feeling of disappointment in life—in emotions, in work, in tasks and in everything that a person does, and for which he exists—is natural and necessary. Otherwise, he cannot push himself and rise higher.
However, there is no need to fear these states! It is simply necessary to strengthen the connection with the right environment, and then all of these states will seem like blessings. So, I suggest that you will have disappointments and, together with this, great fulfillments, and then you will feel life!
From the Kabbalah Lesson in Russian 10/25/15