After the creation of Malchut of the world of Ein Sof, nothing else changed. This is the only form in reality, the Malchut of Ein Sof, in which desire and light are in perfect fusion, harmony, and unity according to the principle: “He and His name are one.”
All other states represent a kind of cover of this perfection. They hide it from us and therefore are called “worlds (Olamot),” which means “concealments (Halamot),” the ten concealing Sefirot that as if absorb the light and conceal it from us who are in this world.
Therefore, if we want to get closer to the world of Ein Sof, we must learn to look correctly at ourselves and at the environment, at the world we are in, over and over again so that this picture takes an increasing similarity to the world of Ein Sof. This means that “He and His name are one.”
As far as possible, we find out who “He” is, what “His name” is, how and with what details of perception, to solder them into one. This is how we move up the degrees of the ladder of spiritual worlds back to Ein Sof.
From here it becomes clear that the stairway and the worlds are not outside, but inside. All these veils of Ein Sof, in which we are now, are layered in ourselves. And they are needed so that we gradually reveal where we are; we reveal ourselves by our own efforts. The more reason I gain, the greater my excitement and inspiration, the more desires I will gain, and I will develop myself to become a resident of the future world, the world of Ein Sof.
This is why we are given the environment of this world. If a person uses all his aspects and elements correctly, then everything is in his power. And if not, then, according to the level of his development, he is under pressure: crises, wars, problems, and disasters of various kinds. Together they clamp him “in a vise” and direct him in the right direction so that he begins to build this world for himself in ever greater similarity with Ein Sof.
From the 4th part of the Daily Kabbalah Lesson 5/11/11, Rav Yehuda Ashlag ”Peace in the World”