In the sixteenth century, the saint and scholar 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 highest aim of life is to develop selfless love for God Krishna, the blue-hued cowherd boy who spoke the Bhagavad Gita. Although only a handful of poetry is attributed to Caitanya, his devotional theology was expounded and systematized by his followers in a vast array of poetical, philosophical, and ritual literature. This book provides a thematic study of Caitanya Vaishnava philosophy, introducing key thinkers and ideas in the early tradition, using Sanskrit and Bengali sources that have seldom been studied in English. The book addresses major areas of the tradition, including epistemology, ontology, aesthetics, ethics, and history, and every chapter includes relevant readings from primary sources.