A Deep Study of Xunzi's 'Jie Pi' Chapter: On the Cognitive Foundations of the Mind—Emptiness, Unity, and Tranquility
This paper provides an in-depth analysis of the core proposition in Xunzi's 'Jie Pi' concerning the nature of cognition: 'How does man know$41 By the mind. How does the mind know$42 By being empty, unified, and tranquil.' It systematically interprets the dialectical relationship and philosophical implications of 'emptiness' (xu), 'unity' (yi), and 'tranquility' (jing) in cognition, tracing their ancient intellectual origins to reveal the systematicity and sophistication of Pre-Qin cognitive theory.

Section 6: The Eternal Inquiry: How Does Man Know$6
As this article concludes, the inquiry will not end.
"How does man know$7"—Master Xunzi gave his answer. But this answer is not the conclusion; it is the starting point for new inquiries.
Why are some people able to achieve "Emptiness, Singularity, and Stillness," while the majority cannot$8 Is it due to differences in innate nature, or differences in later cultivation$9
Why is "obscuration" so universal and persistent$10 Is it possible for man to completely eliminate all "obscuration"$11
Can "Great Clarity and Brightness" truly be attained$12 Or is it merely an eternal ideal$13
"The Mind cannot be forced to change its intentions"—If the Mind is truly completely autonomous, why do people still make mistakes and become obscured$14
These questions Master Xunzi may have hinted at directions for answers within his writings, but the final answers likely remain for each thoughtful individual to explore and experience personally.
Because, as Master Xunzi said:
"Knowing the Dao, one can discern; knowing the Dao, one can act; this is one who embodies the Dao."
Understanding must lead to discernment, and understanding must lead to action—true comprehension comes not from reading and thinking, but from personal practice and experience.
"Emptiness, Singularity, and Stillness" is not a method learned from a book, but a cultivation to be continuously practiced in life. Every day, every moment, every thought, is an opportunity for cultivation, and a moment of testing.
Finally, let us conclude with this profound and solemn passage from Master Xunzi:
"Vast and broad, who knows its limits$15 High and far-reaching, who knows its virtue$16 Effervescent and abundant, who knows its form$17 Its brightness matches the sun and moon, its vastness fills the Eight Extremities—this is what is called the Great Man. Ah, where would obscuration be found!"
Vast and broad, who knows its limits$18 High and far-reaching, who knows its virtue$19 Effervescent and abundant, who knows its form$20 Its brightness matches the sun and moon, its vastness fills the Eight Extremities—this is the Great Man. Where would obscuration be found!
May every reader make progress on the path of "Emptiness, Singularity, and Stillness," constantly approaching the state of "Great Clarity and Brightness."