The 22 letters of the Hebrew alphabet reflect the attributes of the 22 spiritual Sefirot by their form, the way they are drawn, and their signs: nine in Bina, nine in Zeir Anpin and four in Malchut. Each letter stands for a certain Sefira and reflects the way it differs from the other letters, so while reading The Zohar, we can be impressed by the text as if we are in these spiritual Sefirot.
This is what our inclination should be while reading, since the letters are like musical notes for our inner strings, for the attributes of the Creator that enter the created being’s desire to receive and summon in him feelings and impressions. The desire begins to calibrate and tune itself, like a musical vessel, according to the spirit of The Zohar and that spirit touches the strings of your soul and plays on it, like on King David’s violin.
This is how we want to feel The Book of Zohar, so that the Light that comes from it will reach us, fill us, and vibrate our desires. These letters are an invitation to a meeting, to a mutual impression with the Creator. So let’s try it!
From the 2nd part of the Daily Kabbalah Lesson 5/27/13, The Zohar