It is certainly the case that the vessels of the ten sefirot of Beria, i>Yetzira and Asiya receive from Atzilut all the details of the changes, and their specifics, since it is there that the aspect of the planned design of all the details that will be arranged exists in the practical construction of the house in Beria, Yetzira, and Asiya. It can therefore be discerned that the vessels of the ten sefirot: Ḥokhma, Bina, Tiferet, and Malkhut, in Beria, Yetzira, and Asiya, receive from their corresponding aspect, from Ḥokhma, Bina, Tiferet, and Malkhut in Atzilut, i.e., from the planned design that is there.
This is because every detail in the implementation is the result of each detail in the planned design, as explained above at length. Therefore, for this reason we call the vessels of Atzilut the color white, which is not a color at all and yet is the source of all the colors. In terms of the metaphor of the white in a book of wisdom – while there is no grasp of its white, and the white in the book says nothing to us, the white nevertheless carries the entire content of the book of wisdom, for it illuminates around every letter and within each letter, and gives each letter its particular shape and every combination its unique place.
Thus, one can say the opposite to what we said above, namely that we have no grasp of the substance of the red, green, or black letters, and that any grasp or perception we might have of the substance of the letters in the book is only through its white. For by means of its illumination around and within every letter it forms them into shapes, and these shapes reveal to us all of the wisdom in the book.