Book excerpt: That Which Is, known as the Tattvartha Sutra to Jains, is recognized by all four Jaina traditions as the earliest, most authoritative and comprehensive summary of their religion. Unique in bringing together classical commentaries from each tradition, this translation of the Tattvartha Sutra provides in one volume a detailed explanation of the universe, the place of humanity within it, and the path through it to liberation. This excellent introduction to Jaina belief is illuminated by thirteen diagrams and is an invaluable resource for understanding one of the oldest religious traditions in India.