Vimala Thakar is a 'hidden Master' who, during much of her lifetime travelled the world on invitation, teaching small groups about the nature of spiritual inquiry. Her talks were recorded and published. In later years she gave commentaries on some of the major Upanishads, including the Bhagavad Gita and Yoga Sutras of Patanjali. This compilation, written with Vimalaji's support, is an attempt to draw together the most important highlights of her Teaching, together with introductory commentary and a glossary to explain her code words. The reader will gain a profound insight into Vimalaji's revelatory understanding of the Thatness which is both one's own Self, and the unchangeable, all-pervading Energy which underpins all life.