and ‘worlds’ here actually refer to the Keilim of Atzilus, that create worlds, as expressed in the concept of “the 400,000 ‘Worlds’ of Yearning [for the Infinite Light of Hashem],”
These “400,000 worlds” are not actual worlds, rather, they are Hashem’s “thoughts” of creating worlds, each “thought” creating a world. However, as these “thoughts” exist in Atzilus they are One with Him, since the Kav shines in Atzilus. Similarly, the Keilim, which create worlds, are referred to as “worlds” since they create worlds. It is these figurative “worlds” that the Kav is invested in, and unites them with Hashem’s Oneness.
since, in Atzilus, “He and His Life-force (Oros) are One,” and even “He and His Keilim of the Sefiros are One,” Even as the Keilim are the source of creation of worlds, they are still bound up with His Oneness through the Kav.
Analogy of Thought and Physical Objects
And this concept can be understood in the following analogy: The way that a physical object is grasped (imagined) in a person’s thoughts, since a person’s thoughts can “encompass” (through imagination) even something as physical as an inanimate rock. In other words: When a person imagines an object in his thoughts, that physical object “exists” (in the form of imagination) inside his - relatively - spiritual thoughts.
Now, even though the analogy (of a person’s thoughts with a physical object) cannot compare to the analog (of how, through the Kav, the Infinite Light can “encompass” the Keilim of Atzilus), not even remotely, nevertheless, one can attain a minute grasp of the analog by reflecting on this analogy:
For, just as one’s thought have the power to encompass a physical object within itself, even though it (the physical object) is completely separate from it (the power of thought) and incomparable to it, nonetheless, there is a power that joins the two, enabling the physical object to be encompassed within the mind. Even though it is only the image of the physical object that is encompassed in thought, still, the fact that the image of physical object can become part of one’s spiritual mind also requires a special power to connect the two.
Likewise, Above, there exists an ability to join the Lights and the Keilim.
In fact, not only are the Lights of Atzilus united with the Keilim, but through them also the Kav is united with the Keilim. Through the Kav, the Keilim also become united and bound up with the Infinite Light of Hashem.
And there, Above (in Atzilus), they are bound together, making them all one unified, inseparable whole. This is impossible to conceive of in our minds in this world of separation.
The Source of the “Worlds” in Atzilus
And the Keilim of Atzilus are the source of “400,000 Worlds of Yearning,” “13,00 Worlds” which come from the “threads and hairs,” In other words, these “worlds” are derived from the the limitation and contraction of Hashem’s Life-force and power of the Keilim of Atzilus, just as a person’s life-force is constricted and limited in his hair in comparison to the life-force in the rest of his body. Just as the life-force in the hair is derived from the main life force in the body, these “worlds” are extensions of the Keilim of Atzilus into specific aspects, each aspect receiving a limited power and life-force relative to that of the essence of the Keilim. This will be further discussed.
This is similar to how the power of thought can be divided into infinitely many different types of thoughts. One person with one mind can think a (relatively) unlimited number of different types of thoughts. Similarly, each of the Ten Sefiros can produce an unlimited amount of specifc “thoughts” of creations related to that particular Sefira. For example, from Chesed-Kindness of Atzilus, there can come into being infinite types of expressions of kindness in the created worlds. These “potentials” for different types of kindness, are like Chesed having hundreds of thousands of “thoughts” of kindness, that from this “thoughts” are created actual expression of kindness in the created worlds. These 400,000 worlds and 13,000 worlds are the specific expressions, or “thoughts” of the Sefiros, as they still exist in Atzilus.
Even these “thoughts,” these potential “worlds” as they exist in Atzilus, are united with Hashem’s Oneness. This is because the Kav shines not only in the Keilim of the Sefiros themselves as they exist as general powers, but also in every detail and extension of their creative power, as they exist in Atzilus.
