The creature must have a long journey in order to achieve its purpose and rise to the level of the Creator, the Light, and become equal to Him in its essence and height. Initially, the desire develops according to the four phases of the Direct Light, revealing how opposite it is to the Creator. It goes through the First Restriction (Tzimtzum Aleph) and acquires the screen (Masach), beginning to build the system of concealment in the relationship between itself and the Light.
They are connected to the extent of the ability of the desire to enjoy to become like the Light, and they are concealed to the extent of the lack of its ability to do it. This is called the condition of balance, the correspondence of the form of the Light and the desire. This serves as the foundation for the building of the ladder of degrees. At its very height, the vessel, the desire, is absolutely one-hundred percent similar to the Light. The further we descend down this ladder from the very topmost state, the stronger the concealment becomes.
At the top, there is zero concealment and one-hundred percent desire. At the bottom, there is zero desire and one-hundred percent concealment. If you pick a point along the path from above downward, it will be partially revealed and partially concealed. A certain part of the Light becomes revealed, and the rest remains concealed. This is how the spiritual degrees and the worlds are formed, namely Adam Kadmon, Atzilut, Beria, Yetzira, and Assiya.
Everything is built on the basis of correspondence, that is, to the degree of similarity between the desire and the Light. In this way, the ladder descends to the level of our world where the desire completely separates from the Light in order to become independent.
We seem to live a life that is completely independent from the Light because we do not know anything about it. This is exactly why we can begin to rise from this independent point that is separate from the Light and bring ourselves to the state of correspondence with it: We can change ourselves and become more like it. This is what it means to rise up the rungs of the ladder all the way to full correspondence. This is called the final correction (Gmar Tikkun).
The universe is made in such a way that at first, the system of concealment is built, from Above downward. As we rise from below upward, we need to use this concealment to discover ourselves as similar to the Light. The law of correspondence of qualities always remains. After all, the reason that the Creator created the creature was to please it, that is, to bring the creature to a state of absolute correspondence with Him and adhesion.
We must realize our similarity to the Creator in every state, on every degree. To do this, one first needs to value it: to wish to become like the Light and make this appear incredibly important to him. The quality of the Light, the quality of bestowal, must become the most honorable and elevated quality in our eyes. We must strive to correspond with it to the extent of all our strengths and abilities, as much as we can.
Accepting this condition and becoming like the Light, bestowal, as much as possible is called “make yourself a Rav” (important, big). This means that this quality of bestowal must become bigger (Rav) than all my egoistic qualities.
From the 1st part of the Daily Kabbalah Lesson 12/1/2011, Writings of Rabash