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[Also known as: "The Great Treatise I"]

9 Jump to dictionary Show parallel passages Related discussion	系辞上:	天一地二，天三地四，天五地六，天七地八，天九地十。天数五，地数五，五位相得而各有合。天数二十有五，地数三十，凡天地之数，五十有五，此所以成变化，而行鬼神也。大衍之数五十，其用四十有九。分而为二以象两，挂一以象三，揲之以四以象四时，归奇于扐以象闰。五岁再闰，故再扐而后挂。
	Xi Ci I:	To heaven belongs (the number) 1; to earth, 2; to heaven, 3; to earth, 4; to heaven, 5; to earth, 6; to heaven, 7; to earth, 8; to heaven, 9; to earth, 10. The numbers belonging to heaven are five, and those belonging to earth are (also) five. The numbers of these two series correspond to each other (in their fixed positions), and each one has another that may be considered its mate. The heavenly numbers amount to 25, and the earthly to 30. The numbers of heaven and earth together amount to 55. It is by these that the changes and transformations are effected, and the spirit-like agencies kept in movement. The numbers of the Great Expansion, (multiplied together), make 50, of which (only) 49 are used (in divination). (The stalks representing these) are divided into two heaps to represent the two (emblematic lines, or heaven and earth). One is then taken (from the heap on the right), and placed (between the little finger of the left hand and the next), that there may thus be symbolised the three (powers of heaven, earth, and man). (The heaps on both sides) are manipulated by fours to represent the four seasons; and then the remainders are returned, and placed (between) the two middle fingers of the left hand, to represent the intercalary month. In five years there are two intercalations, and therefore there are two operations; and afterwards the whole process is repeated.
Jump to dictionary Show parallel passages		乾之策，二百一十有六；坤之策，百四十有四，凡三百有六十，当期之日。二篇之策，万有一千五百二十，当万物之数也。是故，四营而成易，十有八变而成卦。八卦而小成，引而伸之，触类而长之，天下之能事毕矣。显道神德行，是故可与酬酢，可与佑神矣。子曰：“知变化之道者，其知神之所为乎。”
		The numbers (required) for Qian (or the undivided line) amount to 216; those for Kun (or the divided line), to 144. Together they are 36o, corresponding to the days of the year. The number produced by the lines in the two parts (of the Yi) amount to 11,520, corresponding to the number of all things. Therefore by means of the four operations is the Yi completed. It takes 18 changes to form a hexagram. (The formation of) the eight trigrams constitutes the small completion (of the Yi). If we led on the diagrams and expanded them, if we prolonged each by the addition of the proper lines, then all events possible under the sky might have their representation. (The diagrams) make manifest (by their appended explanations), the ways (of good and ill fortune), and show virtuous actions in their spiritual relations. In this way, by consulting them, we may receive an answer (to our doubts), and we may also by means of them assist the spiritual (power in its agency in nature and providence). The Master said: - 'He who knows the method of change and transformation may be said to know what is done by that spiritual (power).'

《字书 - Etymology》
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《说文解字 - Shuo Wen Jie Zi》
Related discussion

[Eastern Han] 100-121 Xu Shen

Books referencing 《说文解字》 Library Resources

[Also known as: 《说文》]

《卷二》
Related discussion

《王部》

王部:

闰：馀分之月，五岁再闰，告朔之礼，天子居宗庙，闰月居门中。从王在门中。《》曰：“闰月，王居门中，终月也。”

《汉代之后 - Post-Han》
Related discussion

《隋唐 - Sui-Tang》

《艺文类聚》

[Tang] 624

《卷三十九》

《礼部中》

《巡守》

巡守:

《礼注》曰：王者必制巡守之礼何，尊天重民也。所以五年一巡守何，五岁再闰，天道大备，王者恩亦当竟也。所以至四岳者，盛得之，四方之中，能兴云致雨也。
又曰：天子五年一巡守，二月东巡守，至于岱宗，柴而望祀山川，觐诸侯，问百年者，就见之，命太师陈诗，以观民风，命市纳贾，以观民之好恶。

《宋明 - Song-Ming》

《太平御览》

[Northern Song] 977-984

《时序部二》

《闰》

1 Jump to dictionary Show parallel passages	闰:	《说文》曰：闰余分之月，五岁再闰也。告朔之礼，天子居宗庙门中，故其字从王在门中也。
2 Jump to dictionary Show parallel passages	闰:	《白虎通》曰：月有闰何？周天三百六十五度四分度之一，十二月日不匝十二度，故三年一闰，五岁再闰也。明阴不足，阳有余。闰者，阳之余也。

《礼仪部七》

《禘祫》

禘祫:

《五经通义》曰：王者诸侯，所以三年一祫，五年一禘何？三年一闰，天道小备，故三年一祫。祫者，皆取未迁庙主合食太祖庙中。五岁再闰，天道大备，故五岁一禘。禘者，谛也，取已迁庙主合食太祖庙中。

《礼仪部十六》

《巡狩》

巡狩:

《礼记逸礼》曰：王者必制巡狩之礼何？尊天重民也。所以五年一巡狩何？五岁再闰，天道大备。所以至四岳者，盛德之山，四方之中，能兴云致雨也。巡狩者何？巡，循也；狩，牧也。为天循行牧民也。

《方术部八》

《筮上》