Li hsueh
The Rational Philosophy or the Reason School of the Sung dynasty (960-1279) which insisted on Reason or Law (li) as the basis of reality, including such philosophers as Chou Lien-hsi (1017-1073), Shao K’ang-chieh (1011-1077), Chang Heng-ch’u (1020-1077), Ch’eng I-ch’uan (1033-1107), Ch’eng Ming-tao (1032-1086), Chu Hsi (1130-1200), and Lu Hsiang-shan (1139-1193). It is also called Hsing-li Hsueh (Philosophy of the Nature and Reason) and Sung Hsueh (Philosophy of the Sung Dynasty). Often the term includes the idealistic philosophy of the Ming dynasty (1368-1644), including Wang Yang-ming (1473-1529), sometimes called Hsin Hsueh (Philosophy of Mind). Often it also includes the philosophy of the Ch’ing dynasty (1644-1911), called Tao Hsueh, including such philosophers as Yen Hsi-chai (1635-1704) and Tai Tung-yuan (1723-1777). For a summary of the Rational Philosophy, see Chinese philosophy. For its philosophy of Reason (li), vital force (ch’i), the Great Ultimate (T’ai Chi), the passive and active principles (yin yang), the nature of man and things (hsing), the investigation of things to the utmost (ch’iung li), the extension of knowledge (chih chih), and its ethics of true manhood or love (jen), seriousness (ching) and sincerity (ch’eng), see articles on these topics. — W.T.C.