Baal HaSulam, “The Essence of the Wisdom of Kabbalah”: Kabbalists have found that the form of the four worlds, named Atzilut, Beria, Yetzira, and Assiya—beginning with the first, highest world, called Atzilut, and ending in this corporeal, tangible world, called Assiya—is exactly the same in every item and event. This means that everything that eventuates and occurs in the first world is found unchanged in the next world below it, too. It is likewise in all the worlds that follow it, down to this tangible world.
There is no difference between them, but only a different degree, perceived in the substance of the elements of reality in each world.
Imagine a family: Yesterday, we had a fight and today, there is love and peace between us. The general system that is made of seven billion people also reveals new relationships in the network of its mutual connections in the same way. In the world of Assiya there is a bit of indifference, in the world of Yetzira there is renewal, in the world of Beria we are in a state of openness, and in the world of Atzilut we reach fulfillment.
The system, itself, is fixed and rigid. Suppose there is a husband and a wife, children and grandparents; all this makes no difference. Only the mutual relationships among the members of the family can change. This change of attitude is what determines the transition from one world to another.
Thus, I don’t change anything in the structure, but only hasten my development, my ascent up the spiritual ladder, the ladder of relationships. If the relationships within my family are corrupt, I am told, “Something needs to be changed. Try to give in a little.” I answer, “No! No way!” and this is our current state, the current position with regard to the correction. “I should give up my ego?!” Here, we must rise a bit above our stupidity.
From the 4th part of the Daily Kabbalah Lesson 11/20/12, “The Essence of the Wisdom of Kabbalah”