In the sixteenth-century, the scholar and saint Sri Caitanya set in motion a wave of devotion to Krishna that began in eastern India and has now found its way around the world. Caitanya taught that the ultimate goal of life is to develop selfless love for God, who is known as Krishna-the blue-hued boy who spoke the Bhagavad-gita.Followers of Caitanya are famous for singing the names of Krishna and dancing with abandon, yet they are known for having refined the practice and aesthetics of devotion into a detailed science. This imposing devotional edifice was constructed upon a solid foundation of philosophical argument and understanding. Caitanya Vaisnavism approached the very limits of devotional feeling and dedication to Krishna, but this required a supporting structure that was equally sturdy and sophisticated. Caitanya Vaisnava Philosophy uncovers this foundation, using several Sanskrit and Bengali sources that have rarely been studied in English.