Welcome to a summer series discussing the “four worlds” of Atzilus, Beriyah, Yetzirah, and Asiyah! In this episode, we discuss why the four worlds are necessarily distinct, and we prove some lemmas about spiritual worlds through analyzing our own experiences. The series is centered on a letter of the Frierdiker Rebbe (found in his Igros Kodesh 4:156 (letter 954), and published with a translation entitled “The Four Worlds” by Kehos in their Chasidic Heritage Series).