This clearly written book gives the methods of meditation revealed by the enlightened sages.They taught that the real purpose of life was to know God, or Truth. This knowledge becomes possible when the latent spiritual faculties of the mind are awakened by the practice of meditation. The author, Hari Prasad Shastri, learnt the traditional methods of meditation practice and enquiry from his own teacher, the Mahatma Shri Dada of Aligarh, and also visited many of the Yogis and Mahatmas who were living in the region of the Himalayas. As a result, as well as being a scholar of wide experience, Dr Shastri also became a teacher in the direct line of one of the oldest teaching schools of the classical methods of meditation and spiritual practice, Adhyatma Yoga, the way of Self-knowledge.The teachings given in this book are in accord with those found in the holy classics of India, China and Iran. They include the science of meditation as taught by Patanjali, Shri Krishna, the Zen Buddhists and the Sufis. The first part of the book presents the essential principles on which meditation is based. The second part gives details of practices that will be of particular value to those who wish to start meditation practice for themselves. The more advanced forms of meditation require the guidance of a teacher, and an outline of the principles involved is given in the last section of this book.