“As we know, bears hibernate in caves. They appear almost lifeless. This is an analog to the practices of ancient shamans, and to Sufis who practice the forty-day halvet (retreat), in which the Shaman would enter a cave, have an experience of dying, explore the spiritual realms, and then is reborn as the Initiate or Master (just as the bear is reborn each spring as it “wakes up” and leaves its cave).”