"The Saints and the true devotees of God have all told of the Light and Sound. Whatever references I have found, by parallel study of religions, I have incorporated into the book "Naam or Word"; so if you are interested in the references you will find them there." Sant Kirpal Singh. Contents: To the Honest Seeker; I. Naam or Word: Introductory; Evidence from Various Religions; A Study in Naam; Hari Bas; Conclusion.; II. Shabd – The Sound Principle; III. Amrit – Nectar or the Water of Life; IV. Kirtan – Celestial Music or Divine Harmony; V. Bani and Gurbani – Scriptures and Inner Music; VI. Guru-Mantra – The Master’s Word; VII. Vakhar – A True Deal in True Wares; VIII. Deeksha – Initiation; IX. Gyan or Jnana – Knowledge-Enlightenment; X. Charan Kamal – The Lotus Feet of the Master: The Lotus Feet; The Dust of the Lotus Feet.; References; Literature. 2. Edition 2019, Unity of Man.
Source: https://www.kirpalsingh-teachings.org . No rights reserved, see page II of the book.