Baal HaSulam, The Study of the Ten Sefirot, Part 1, “Inner Reflection,” Item 32: The thing is that the Otiot (letters) of the four-letter Name (Yod-Key-Vav-Key) do not imply and indicate the amount of Ohr (Light) in Ein Sof (Infinity). Instead, they indicate measurement of the impact on the Kli (vessel). The white in the parchment of the scroll of Torah implies the Ohr, and the black, being the Otiot in the scroll of Torah, indicates the quality of the Kelim (vessels).
When Baal HaSulam talks about white and black colors in the book, he does not mean physical paper and ink, or parchment made of animal skin. He talks about how and where we reveal the fourth phase “Dalet” (the last phase, corresponding to the external Kli, “skin”).
I take the “animal skin,” meaning my animate nature, its final fourth stage, and divide it, slice it into two parts, tearing the inner from the outer layer. Then, from the inner layer of the skin, “parchment” is made, on which I can write letters.
This is my final stage, which I still can correct. The outermost layer of desire remaining after this separation is impossible for me to correct. Thus, light and darkness within the creature are revealed at the most perfect degree. Nothing more is possible!
The big revelation of the Light will take place only at the end of correction (Gmar Tikkun) where we discover that there are no letters and no parchment, and it is possible to correct all the “skin”: the whole Malchut is included in correction. Then, the letters disappear, and it turns out that “He and His name are One.”
Malchut and Bina are fully connected and reach the degree of Keter, as it is said: “And they both will go together.” That is why the letters, originating from the Sefirot ZAT de Bina (the lower half of Bina) and below it, disappear. There is no more difference between white and black.
The Torah is given to us only until the end of correction. After that, this method is no longer needed. If we finish the correction, we do not need the Torah (the Light that Reforms). We will be in another, new state.
From the 3rd part of the Daily Kabbalah Lesson 5/31/2011, Talmud Eser Sefirot