Zhiyi

Zhiyi (; 538–597 CE) also called Tiantai Dashi () and Zhizhe (, "Wise One"), was a Chinese Buddhist monk, philosopher, meditation teacher, and exegete. He is considered to be the founder of the Tiantai Buddhist tradition, as well as its fourth patriarch. Śramaṇa Zhiyi is widely regarded as one of the most influential figures in the development of East Asian Buddhist thought and practice. As the first major Chinese Buddhist thinker to construct a comprehensive religious system based primarily on Chinese interpretations, Zhiyi played a crucial role in synthesizing various strands of Mahayana Buddhism into a unique coherent framework. According to David W. Chappell, Zhiyi "has been ranked with Thomas Aquinas and al-Ghazali as one of the great systematizers of religious thought and practice in world history."

Zhiyi relied on the teachings of the Lotus Sutra as the main basis for his system, though he also drew on numerous texts, such as the works of Nagarjuna. One of his central innovations was the Threefold Truth, which unifies the truths of emptiness, and provisional existence, with a holistic third truth: the middle. Zhiyi also developed an influential interpretation of the Lotus Sutra, which he used to interpret all other Mahayana Buddhist teachings. Zhiyi's comprehensive work on Buddhist practice, the (Great Cessation-Contemplation), outlines step-by-step instructions for Buddhist meditation and cultivation, combining traditional Indian methods with unique innovations. This text continues to serve as an influential guide for meditators across East Asian Buddhist traditions.