The meaning of Sohum is "I am He" or "I am That". What is 'That'? 'That' means Brahman, the Universal Soul. This mantra is just the natural inhalation and the exhalation of the breath, happening in every human being and other living souls. Since the chanting of Sohum mantra goes on within us all the time spontaneously, no effort is required to repeat it. It is therefore called the ajapa-japa (the chant-less mantra), which means that it is just repeated mentally and synchronized rhythmically with every breath. That's all. Humsa mantra is just the reverse of Sohum mantra. Both Sohum and Humsa give the same spiritual effects. This mantra is the most effortless and hence the most effective mantra which acts as a pilgrimage to the path of enlightenment. Starting from an introductory chapter (which is very useful for the beginners), this book explains in details all the relevant aspects of Sohum and Humsa mantras, their analysis and glory as recorded in various scriptures, the step-by-step Sohum/Humsa-based ;" meditation techniques and finally, several benefits accrued at the physical, emotional, mental And spirit 'al levels to the sadhakas (practioners) of this meditation technique. A large number of original Sanskrit mantras extracted from Upanishads and other scriptures, both in Devanagri and Roman scripts, along with their meanings and explanations, are given in this book to give it a scholastic and authentic look. The author believes that that this book will be highly appreciated by a large number of readers including scholars and seekers alike.