The Book of Zohar, Chapter “Beresheet (Genesis),” Item 183: Darkness is the black in the Torah, the ink in her letters. Light is the white in the Torah, the parchments on which the letters are written. When the light clothes in darkness, it is written about the Torah, “I am black and beautiful.” When the light—the white in the Torah—departs there, the Torah says, “Do not see me that I am swarthy.”
By the form of the book, black letters on a white background, we see that it is the black color that conveys all the information to us. Although we may say the opposite: If we enter the attribute of bestowal into the white Light of the background of the book, we study the white part in contrast to the black—not black on a white background, but white in which there are small black voids.
Therefore, two things were said about the Torah: “Don’t see me that I am dark” and “I am black and beautiful.” On one hand, there is the Light, the attribute of bestowal and on the other hand, there is the desire, the vessel, the attribute of receiving. Therefore we are in a state of ups and downs when we feel and study the white in contrast to the black and vice versa.
This is a study in which one completes the other, and thus enables us to see not in our desire, not in the attribute of receiving, but rather from the perception of the upper, from the attribute of bestowal. When we are in our own desire, we act from our letters, from the darkness on the white Light’s background. But if we are incorporated in the upper, like Galgalta ve Eynaim and AHP, we learn from the Light of Ein Sof because then we are incorporated in it, and learn the white Light that is in the books and not the black.
Thus we learn one attribute in contrast to another, until they complete one another and the letters complete the white background and the white completes the black part of the letters. The letters don’t disappear, but the whole Torah turns fully into Light, as it says: “the night will glow like daytime.”
From the 2nd part of the Daily Kabbalah Lesson 2/1/12, The Zohar