Nowadays, yoga is advertised as a means to improve health, lose weight, gain mental superiority over others and achieve success in business. However, in this book, the world famous yoga teacher reveals the true goal of this ancient teaching - to achieve an eternal love union with the Almighty. In the West, especially in this age, many systems of yoga are widely known, but, in fact, none of them gives a clear idea of how to achieve perfection. In the Bhagavad-gita, Sri Krishna, the Supreme Personality of Godhead, teaches Arjuna exactly how to achieve the perfection of yoga. If we really want to achieve perfection in yoga, we must refer to Bhagavad-gita, which contains the authoritative instructions of the Supreme Personality of Godhead.