Yoga is over 5,500 years old, making it the oldest known spiritual practice. Millions of people around the world now practice it, often to lose weight or tone their bodies. Although yoga is effective at this, it is in fact a spiritual discipline of which the exercises are only one part; its ultimate goal is to unify body and mind and bring us to a state of ultimate peace. This book explains the philosophy and teachings behind yoga in a fresh and accessible way, and also includes clear and poetic translations of the key yoga scriptures: the Yoga Sutras, the Bhagavad Gita and the Upanishads. These ancient texts contain instructions for the philosophy, method and practice of yoga and are guides to inner wisdom. Whether you are a beginner at Yoga, an experienced practitioner, a teacher or in teacher training, this book will enable you to add new depth and meaning to your current practice, accessing the full potential and power of Yoga to transform your life.