The Jewish mystical tradition of Kabbalah is a rich, magnetic world of thought and teaching. It has resonance with modern understandings of reality — and describes a cosmic significance to the practical moral call to “tikkun olam,” “repair the world.” Rabbi Lawrence Kushner is a long-time student and articulator of the mysteries and messages of Kabbalah. We speak with him in honor of the 20th-century historian Gershom Scholem, who resurrected this tradition from obscurity and made it accessible to modern people.