The main aim of this work is to reveal the mystical knowledge of the Vedas to those who resort to Sadachar like Sandhyavandanam. Great merits accrue to those who daily perform Sandhyavandanam and chant Gayatri Mantra. They live in divine communion. This book brings a synthesis of Karma, Upasana and Jnana by presenting the guiding philosophies of Sadacharanusandhanam of Bhagavadpada Shankaracharya and the Isavasya Upanishad. Sri Adi
I am grateful to His Holiness Jagadguru Sri Sri Bharati Tirtha Mahaswamiji, Sri Sri Jagadguru Shankaracharya of Sringeri Sharada Peetham for inspiring me to complete this work. I express sincere thanks to my colleague Sri R. Srinivasan for editing the manuscript and providing valuable suggestions.