“理”是宋代理学的一个核心范畴。“穷理”、“循理”、“推理”是理学展开其理论的三个步骤。概括地说，三者以天地人之间内在的整体性和谐为始终；分别地说，穷理是为了体认天地人之间的全体秩序，循理是为了通过认同全体秩序而确立天成的秩序体系，推理是为了调适人（个体 “Reason” is a core category of the Neo-Confucianism. “Poor management”, “management” and “reasoning” are three steps that Neo-Confucian theory starts. In a nutshell, the three are based on the inherent integrity and harmony among heaven and earth; in other words, poor reasoning is for the purpose of recognizing the entire order among heaven and earth and for the purpose of establishing the order of heaven by recognizing the whole order System, reasoning is to adapt to people (individuals