The Zohar, Chapter “VaYikra (The Lord Called),” Item 156: The thirteen qualities of Rachamim depend on the Yod, on the upper tip of the Yod, Keter, in which there are the thirteen corrections of Dikna. Hence, the Yod consists of Vav–Dalet, to indicate the ZON within her, from which they become YESHSUT, which is Bina that returned to being Hochma. This is where all the Mochin emerge, and they are the perfection of everything because the filling of Vav–Dalet in Gematria is ten, meaning that they are as important as she.
A question I received: The Zohar talks about letters a lot. What is the connection between the definitions of the letters described in The Zohar and a letter used as a symbol describing how the Upper Governance system influences us?
My Answer: They are the same. Letters are the spiritual vessels through which the Light acts upon us. We can talk about the Light by calling it a letter, such as “Yod,” “Vav,” or “Dalet.” A letter is a property of the Light, which the Light acquired when it has gone through the letter in order to impact us in a certain way. A letter is also a property of the spiritual vessel that has become similar to the Light in order to perceive it.
According to the law of the equivalence of form, it is impossible to perceive the Light unless I am similar to the form through which it impacts me. Suppose the Light enters through “Vav” and acts upon me. Then, I should also acquire the property “Vav,” to assume the form of “Vav” in order to be connected with the Light. But since I myself build similarity to “Vav” from my material, I am not “Vav” any more. My material is now different, and I become the next letter, “Dalet.”
Thus, on the one hand, we have “Yod” (Hochma), whose three letter spelling (“Y-O-D” or “Yod–Vav–Dalet“), shows in what form we can perceive it. When we acquire “Vav” and “Dalet,” “Dalet” will become similar to “Vav.” But aren’t Dalet and Vav two different letters? True, they are different, but they are similar to one another. Since they are created from different material, they acquire appropriate forms. This is why there are so many forms of letters even though each form is bestowal.
From the 1st part of the Daily Kabbalah Lesson 5/23/10, The Zohar