The document is an introduction to the Bhagavad Gita written by A.C. Bhaktivedanta Swami Prabhupada. It discusses that the Bhagavad Gita should only be understood from the perspective that Krishna is the Supreme Personality of Godhead. It aims to teach that the purpose of life is to revive one's relationship with Krishna through devotional service. Understanding the Bhagavad Gita correctly results in liberation from material existence and returning to the spiritual realm in eternal association with Krishna.