The Jewish and Christian religions are based on the teachings of Kabbalah, which is a profound schematic of the dimensions of nature and the laws that manage them. In nature, there are Four Worlds. True spiritual development is a process of awakening in all four worlds.
This is the third of four courses on Kabbalah.
"If you would gain knowledge of light, begin by discussing darkness. If you would consider Truth, begin by discussing falsehood, the opposite."