《六經天文編》易學天文的納甲說與卦氣說

On Theories of Najia and Hexagram-Solar Cycle Relation in the Studies of I-Ching Astrology of Liu Jing Tian Wen Bian

本文彙整《六經天文編》易類部分的納甲說與卦氣說資料，羅列各家說法，先以漢代釋易條例為主，逐一解釋其理論，證成易學天文充滿著濃厚的象數色彩。次說明納甲與卦氣二說，本以藉天象述鼎爐火候、假曆數占災異吉凶，經後代學者之推闡引申後，分流衍派，形成龐大的易學象數體系。而披沙撿金，凸顯其在天文、曆法方面的具體成果，禮讚無所不包、無所不備之易道之偉大，則是本文主旨。

This paper aimed to explore the theories of “Najia” and “hexagram-solar cycle relation”, as found in the section on I-Ching (Book of Changes) in the collection Liu Jing Tian Wen Bian. The study began with an analysis of interpretations on I-Ching by Han scholars, demonstrating that studies of I-Ching astrology are characterized by an emphasis on Xiang-Xu (forms and numbers). It then examined the origin of the two theories, one as a way to explain the practice and performance of alchemy according to lunar phases, and the other as a way to predict fortune based on the calendar. The results showed that the two theories, as interpreted by later scholars, evolved into various schools, thus creating an enormous I-Ching system of form and numerology. The primary purpose of this study is to present the concrete achievements made by scholars with regard to astrology and the calendar in studies of I-Ching, thus highlighting the comprehensiveness of Zhou-Yi philosophy.