Carefree Little Scholarly Immortal.

Summary

Summary of the text: The passage explores two philosophical approaches to understanding principles: "rational learning" and "heart learning". Rational learning focuses on understanding external principles of objects and the world, while heart learning emphasizes that principles originate from within one's heart. Li Chang An presents a nuanced perspective suggesting these approaches are complementary, not contradictory. He argues that principles exist both naturally and through human ethics, and that understanding one's inner principles can guide external actions and potentially lead to a path of becoming a sage.

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