Answer: We receive the Light only through dissemination since according to all of the physical laws, energy can only flow when there is somewhere it can flow, like a running wave, the electrical current in a circuit, water in a pipe. However, if the Light has nowhere further to spread, then you become a stopper blocking its way.
Imagine that there is a source of energy, a battery with a wire connected to it. However, this wire is broken and it does not lead anywhere. There will be no current there, although it is connected to a source of energy! The current will not flow in it because it has not connected to the second pole and has not provided for a closed circuit for the circulation of the current.
Throughout all of the thousands of years when Kabbalah was still hidden, it was only revealed to a few chosen people in each generation in order to somewhat renew and adapt the methodology for the current generation. However, in essence, they didn’t do anything other than this adaptation for the new time.
However, when the opportunity to widely disseminate the science of Kabbalah and to close this this circuit has finally been revealed, it means that the time for correction and revelation has arrived. And the whole of the thousand years history was only the preparation for revelation.
That is why it is necessary to understand that by widely advertising Kabbalah you are not only helping others, but first of all, yourself. In this way, you are closing the circuit for the revelation of the Creator and by this, you give Him pleasure. Without this closed circuit, you are worth nothing.
It is written that Israel only passes the Light through itself to everyone else. That is why we must build this closed circuit between the Creator and all of the other people who do not have a direct connection to Him, and we must become a transmission unit in the circuit ourselves. This is the only way we will be able to accomplish our mission.
If the desire to reveal the Creator has been awakened inside of you, it means that you have to become the transmitter of the upper Light and pass it on to all of the other “consumers” of it.
From the 1st part of the Daily Kabbalah Lesson 9/5/12, Writings of Rabash