The Tattvartha Sutra is a foundational text in the philosophy of Jainism, written by the sage Umaswati. It serves as a comprehensive guide to understanding the nature of reality, outlining the principles of Jain metaphysics, ethics, and spiritual practice. The text emphasizes the importance of knowledge, right conduct, and the path to liberation. This sutra is significant for its systematic approach to explaining the concepts of soul, karma, and the cycle of birth and rebirth. It is often regarded as the first text to systematically compile Jain teachings, making it essential for both scholars and practitioners of Jain philosophy.