A Northern Song Neo-Confucian and founder of the Guan (Guanzhong) school, known as Master Hengqu. He championed the qi-based ontology of "the Great Void is qi," taking "qi" as the most fundamental reality of the cosmos and critiquing the Daoist and Buddhist views of emptiness and illusion. He composed the celebrated "Four Lines of Hengqu"—"To establish the heart for Heaven and Earth, to establish the life for the people, to continue the lost learning of former sages, to open peace for ten thousand generations"—whose spirit of universal benevolence and the scholar-official's ultimate sense of responsibility profoundly inspired the Confucian ethos for eight hundred years thereafter.
Zhang Zai, courtesy name Zihou, ancestral home Daliang, born in Chang'an. In his youth he loved military affairs and once planned to rally allies to recover lost territories west of Tao. When he sought an audience with Fan Zhongyan, Fan urged him to abandon arms for letters, giving him a copy of the Doctrine of the Mean. Zhang Zai thereupon turned to learning. He read widely through Buddhist and Daoist texts without finding satisfaction, then returned to the Six Classics, finally achieving an awakening to the true meaning of Confucianism. After passing the jinshi examination, he held posts such as judicial administrator in Qizhou and magistrate of Yunyan, prioritizing the cultivation of roots and good customs in governance. Because he disagreed with Wang Anshi's New Policies, he resigned and returned to Hengqu Town in seclusion, teaching and founding the Guanxue school. His life was one of resolute simplicity—living in a humble alley on a vegetable diet, yet his spirit grew ever stronger. His Correcting Youthful Ignorance (Zheng Meng), in seventeen chapters, was his final work, systematically elaborating his qi-based philosophy, becoming an important strand in Song-Ming Neo-Confucianism alongside Cheng-Zhu learning and Lu-Wang learning of the mind.
Zhang Zai takes "the Great Void is qi" (tai xu ji qi) as his cosmological cornerstone, holding that the Great Void is not absolute nothingness but the substance-state of qi itself: when qi condenses it forms visible things, when it disperses it returns to the formless Great Void. The cosmos is not created from nothing but is an eternal process of qi's gathering and dispersal. This thoroughly refutes Daoist "being arises from non-being" and Buddhist "taking mountains, rivers, and the great earth as illusory." In his theory of human nature, he distinguishes "nature of Heaven and Earth" (heavenly nature—pure, perfectly good, ontological) from "physical nature" (nature conditioned by qi endowment, limited and biased). The path of cultivation lies in "transforming one's physical nature" to restore heavenly nature. In ethics, he proposes "the people are my brothers and things are my companions" (min bao wu yu)—regarding all people under heaven as siblings and all things as kindred, extending the heart of benevolence from family ethics to universal cosmic embrace.
"Establish the heart for heaven and earth; establish the mandate for the people; continue the lost learning of former sages; open peace for ten thousand generations. — Zhangzi Quanshu"
How does Zhang Zai's "the Great Void is qi"—affirming the indestructibility of matter and the condensation of qi into all things—resonate at the highest intuitive level with modern quantum physics' view of "the undiminished fluctuation of quantum fields"?
Zhang Zai's "qi" and Spinoza's "substance" are both the sole, self-caused cosmic ground, with all things as its modes—both deny a supernatural personal creator-god.
Can a single material-energetic ground explain all of reality? Do the monistic philosophies of Zhang Zai and Spinoza represent parallel discoveries of the same truth, or do their different metaphysical commitments make them fundamentally different?
Zhang Zai's qi possesses both material and dynamic properties simultaneously; Aristotle separates form as the efficient cause from matter as the passive substrate—a fundamentally different structure.
Is the ultimate ground of reality best understood as a unified material-energy or as a combination of form and matter? Do the cosmological frameworks of Zhang Zai and Aristotle represent complementary or incommensurable approaches?
Engage in AI soul dialogue with Zhang Zai, or join the intellectual debate arena