In Hinduism, it is believed that some Hindu mystics and gurus who have who have achieved certain spiritual powers (called siddhis) are able to levitate. In Sanskrit, the power of levitation is called laghiman ('lightness') or dardura-siddhi (the 'frog power').[21] Yogananda's book Autobiography of a Yogi has accounts of Hindu Yogis who levitated in the course of their meditation.