In his later years, Zhu never ceased reassessing his own ideas, and, as he engaged in debates with other Confucian interpreters, he regretted that many of the works he wrote in his younger days had led himself and others astray.
朱子晚年仍不斷反省與同時代理學家的學術辯論，並「大悔中年著述，誤己誤人」。