Zhang Zai

Zhang Zai (1020–1077) was a prominent Chinese philosopher, politician, essayist, writer, and cosmologist during the Song dynasty. He is renowned for articulating four crucial ontological goals for intellectuals: to cultivate the inherent qualities of Heaven and Earth, to foster a prosperous society for the people, to preserve and develop the legacy of past sages' scholarship, and to establish enduring peace. Zhang Zai's philosophical system is deeply rooted in the concept of Qi (vital force), which he considered the fundamental substance from which all things in the universe are composed. He posited that Qi is in a constant state of transformation, governed by the principles of Yin and Yang. This metaphysical framework led him to believe that all existence shares a common essence, an idea with profound ethical implications. His significant work, 'Correcting Ignorance,' completed in 1076, is a cornerstone of his philosophical contributions. Despite facing political disagreements that led to periods of retirement, Zhang Zai dedicated his life to study and teaching, profoundly influencing later Neo-Confucian thinkers like the Cheng brothers and Zhu Xi, who recognized him as a founder of the School of the Way.