The Zohar, Chapter “VaYikra (The Lord Called),” Item 20: And one appointee was established on the gate from the outside, and his name is Gazriel. With him, there are twelve appointees surrounding him—three, three to each side, on four sides. The [lower] general Merkava is twelve—Michael, Gabriel, Uriel, Raphael—in each of which are three lines, HGT, which are twelve. Individually, each contains twelve.
In spirituality, every creation consists of twelve parts. Every element including the smallest and the entire spiritual reality, has the same structure and the same properties. If we carved out even a tiny portion, it would contain all the properties of the whole structure. Therefore, there is no difference between the general and the particular in spirituality, contrary to our world where parts are added together to form the whole.
In the spiritual world, quality rather than quantity is important; the whole is not created as a sum of its parts. Rather, every part is already the general; however, it is revealed at the qualitatively new degree. The spiritual reality is revealed only in a person’s attainment, within one’s desire. This means that we attain the forms of desire, which are called the soul and the Light, acting inside the desire and giving such forms to it.
It turns out that the entire reality is one soul Adam HaRishon. All of the worlds, spiritual objects (Partzufim), angels, and forms are the four levels of the desire (still, vegetative, animate, and speaking). The entire creation has the same structure. Besides it there is only Atzmuto, the essence of the Creator, which is unattainable. We can only guess that it is the root of everything that we reveal, but we cannot attain Him.
From the Evening Zohar Lesson 5/13/10