Full context:   As the four Worlds link the Infinite with this realm, they also enable the soul to ascend in devotion or mystical states, towards the Divine. Each World can be understood as descriptive of dimensional levels of intentionality related to the natural human "desire to receive", and a method for the soul's progress upward toward unity with or return to the Creator. (The terminology of this formulation is based on the exposition of Lurianic Kabbalah by the 20th century Kabbalist Yehuda Ashlag).