The movement teaches simple spiritual exercises, such as singing "HU ", called "a love song to God", to experience the Light and Sound of God and recognize the presence of the Holy Spirit.[6][7][8]
^"Books". Online Bookstore. Retrieved 16 March 2018.
^Handbook of World Religions, Len Woods, The Livingston Corp., 2008, Published by Barbour Publishing, Inc., P. O. Box 719, Uhrichsville, Ohio 44683: "Harold Klemp (1942-Current)--a native of Wisconsin and former divinity student, Klemp discovered Eckankar in the 1960s. In 1981 he became Sri Harold Klemp, the Mahanta, the Living Eckankar Master, the spiritual leader of Eckankar; Klemp's spiritual name is Wah Z, 'the Secret Doctrine.'" Ch. 14, ECKANKAR, p. 69
^"This sound develops through ten different aspects ... until it finally becomes Hu, the most sacred of all sounds. This sound Hu is the beginning and end of all sounds ... the echo of bells or gongs gives a typical illustration of the sound Hu. The Supreme Being has been called by various names in different languages, but the mystics have known him as Hu, the natural name, not man-made, the only name of the nameless which all nature constantly proclaims. The sound Hu is most sacred; the mystics of all ages called it Ismi-Azam, the name of the most High, for it is the origin and end of every sound as well as the background of each word. The word Hu is the spirit of all sounds ... This alone is the true name of God, a name that no people and no religion can claim as their own. ... All things and beings exclaim this name of the Lord, for every activity of life expresses distinctly or indistinctly this very sound. ... The mystery of Hu is revealed to the Sufi who journeys through the path of initiation." – Inayat Khan, The Mysticism of Sound / Abstract Sound.