From Rabash’s lesson: When a person is naked, he feels a deficiency, and that’s why clothing for him is like filling that covers his deficiency. In spirituality too, an empty desire feels that it is deficient. When the Light comes and fills it, it is like clothing.
Clothing is the level of compatibility of the desire to the Light. The clothing can be inanimate, vegetative, animate, or different human characters—all this is the clothing a person has, which determines which attributes of the Light the desire can adopt by dressing in it in order to resemble the Light.
Our main work is to yearn to become a clothing on the upper one, to receive a form that is the most compatible with the Creator. We should constantly prepare ourselves to take on a new form. Everything is determined by the clothing because the desire itself has no form. It depends on the clothing, whether a person will be a beast or a human who resembles the Creator; it is one of the two.
On the way we should constantly see ourselves in a state of free will, half guilty and half innocent according to the clothing, according to the form I am inclined to. In order to do that I have the group, the teacher, and the books, which can attune me to a clothing, a form that is as similar to the Creator as possible.
From the Preparation to the Daily Kabbalah Lesson 6/4/2012