It sheds light on the essence of our nature, being of Divine origin. Hints are given as to what and how the Sufi way, with the help of a spiritual guide, can contribute to one’s spiritual and religious development. This is the first volume of the Indian edition of all the works intended for publication of Hazrat Inayat Khan, the great Sufi mystic who lectured and taught in the western world from 1910 until his passing away in 1927. The volume contains four parts: The way of Illumination; The Inner Life; The Soul, whence and whither?; The Purpose of life.