Additionally, the four letters of the divine name correspond to the four worlds, which are Atzilut (Emanation), Beria (Creation), Yetzira (Formation), and Asiya (Actualization).8The yod of the name corresponds to the world of Atzilut, the first heh to the world of Beria>>, the vav to the world of Yetzira, and the second heh to the world of Asiya. The world of Asiya includes this world within it. Thus there is no creature in this world that is not engendered from Ein Sof, blessed be He, meaning it is rooted in the initial intent for the Creation, which is to give His creations pleasure, as stated above.
This initial intent is necessarily comprised of light and vessel, that is, a certain measure of shefa together with the will to receive that shefa. The measure of shefa emanates from His essence yesh miyesh, while the will to receive the shefa comes into existence anew ex nihilo (yesh me’ayin), as stated above. In order that the will to receive may reach its final form, it must devolve, together with the shefa it contains, through the four worlds of Atzilut, Beria, Yetzira, and Asiya.
At that point, the created being is complete, composed of both light and vessel, which is referred to as body and the light of vitality it contains.