Answer: The light is what enters our desire and gives absolute fulfillment with satisfaction, knowledge, a sense of existence in all parameters on all axes.
The light is the only intelligent energy in the world that carries out all actions upon matter. Matter is the desire to receive, to enjoy. There is nothing more than light and desire. The light works with the desire.
They are opposite in properties. The desire wants to receive everything for itself, to absorb, and to be filled. The light wants to give, emanate, and fill. The entire universe is built based upon these two components, including our world and all other worlds. Only it consists of micro-doses of desire and light.
Question: It turns out that behind any desire there is a spark of light?
Answer: Without exception. Otherwise the desire would not exist.
From KabTV’s “Fundamentals of Kabbalah,” 12/22/19