The Mencius, a disputable canon, promoted from a section of the schools of philosophers (zi) to the classics (jing) through being officialized and canonized. While former scholars have focused on discussing the promotion of the Mencius in the Tang and Song Dynasties, there were, however, few criticisms on the Song savants' arguments about Mencius, which was left by Zhu Xi through the historical notion of ”sagely transmission.” As a result, I will take theMengzi jizhu (Collected Commentaries of Mencius) as quotation to investigate Zhu Xi's contemplation, which will manifest the dialectic of the spread of Confucianism and political rebellion. Within this investigation, we can speculate about the process of the Mencius being canonized, for Confucius and Mencius' analects which were molded through the succession to the Way (daotong) by reverting to mental character. Zhu Xi confirmed the merit of the Mencius and then used it to prove that the philosophy of principle (lixue) is not the instrument for politics, and philosophers, moreover, work hard for interior sageness which cannot be affected by their exterior achievement, according to imbibing various savants' points of view as well as rethinking the spread of Confucianism. To be sure, this is the meticulous and fruitful result of Zhu Xi's response to the practice of Confucianism in the North Song Dynasty.