The Zohar, Chapter “Tzav (Command),” Item 39: …since Malchut was taken from ZA and was built into a complete Partzuf. It follows that ZA is lacking the Sefira of Malchut, and as it is generally lacking from the Malchut, it is lacking from her in each of his elements, since each particular Sefira consists only of nine Sefirot, and not of ten. Hence, when the Malchut rises and joins ZA, she complements each of his elements into ten Sefirot, complementing each of his organs.
This is the law of the integral system. By completing any small part of the system, we complete all of its parts. All the particular Sefirot of Malchut are interconnected just as all the Sefirot of Bina, Zeir Anpin, and Hochma are. That is because all the Sefirot come from the general structure of Infinity: Keter, Hochma, Bina, Zeir Anpin, and Malchut, or the point of the letter Yod, Yod, the upper Hey, Vav, and the lower Hey. There is nothing besides this structure.
All the levels and worlds, which seem to have expanded from Infinity downwards until this world, are just the same structure of Infinity that we cannot approach correctly in its 100% authentic form. Therefore we have been given the opportunity to correct the same structure in a lessened form, to a smaller degree.
Therefore, we always complete the same Sefirot. All the Malchut in all the worlds come from one Malchut of Infinity in all of its particular Sefirot, which in turn also divide into its particular Sefirot and so on. All of their Malchut belong to the same Malchut of Infinity. All of the Zeir Anpin belong to Zeir Anpin of Infinity. The same thing is true for Bina – all the Binas belong to the Bina of Infinity, and likewise all the Hochmas belong to Hochma of Infinity.
In any place, any Sefira and any quality is connected to its source. And even though all the Sefirot are interconnected into ten Sefirot, there is always a connection between the parts with the same name.
So the Lights expand from Above downwards through ten Sefirot, from Keter to Hochma, Bina, Zeir Anpin and Malchut, or in the reverse direction, ascending from below upwards through the Reflected Light. But as the Light passes through this passageway, it always attains the Sefira intended for it, entering it and filling it with the necessary Light from the same place in Infinity that it came from.
If I want to fill a specific quality, I have to relate to it with the same quality, desire, and Light, and that is how I fulfill it. There is an aspect of the Light’s passage, according to screens, the dissemination of Yod-Hey-Vav-Hey from Above downwards or from below upwards, and there is an aspect of the character of the Sefirot. Therefore, an “ear,” for example, cannot receive Light intended for the “eye” or carry out its function. A screen over a specific desire can perform a special function that precisely corresponds to that desire.
It turns out that in any case there is a very precise division into HaVaYaH and three lines, according to their source in Infinity: the four-letter HaVaYaH (Yod-Hey-Vav-Hey).
From the 2nd part of the Daily Kabbalah Lesson 11/18/10, The Zohar
Working With The Light