Question: Throughout all of history, Kabbalists passed the science of Kabbalah from one generation to the next. But on the other hand, they created a special concealment over this science to make sure it wouldn’t expand all over the whole world. Why?
Answer: Kabbalists reveal their attainments in concealment. That’s why it is written, “When revealing one measure, conceal two.” This is talking about the revelation of the necessary desire in a person, in which he will then feel the upper world.
Our nature is desire, and only if this desire is present do we perceive the world inside of it. The greater the desire, the more it perceives. All the objects in our world differ from one another only by the size of the desire. The desire of level 1 is still, level 2 – vegetative, level 3 – animate, and level 4 – human. If the desire intends to enjoy by itself, then it is in our world. If it intends to give pleasure to someone else, then it is in the upper world.
It’s known that pleasure can only be felt to the extent that one has a desire for it. In other words, the Light can only be received when there is a vessel.
Concealing two measures means that a Kabbalist teacher must create a concealment in a student—the desire of one measure, the need for revelation, and the concealment of one more measure so this desire for revelation would be for the sake of bestowal. In that case, the student will merit revelation inside of that corrected desire.
From the 2nd part of the Daily Kabbalah Lesson 5/9/11, The Zohar
The Gemstone Of My Soul
Luminous Garments Of The Soul
How To Attain The Revelation Of The Book Of Zohar