64卦序
不只是排序，是一個敘事
六十四卦不是隨機排列。從第一卦乾到第六十四卦未濟，每一步都有序卦傳給出的理由， 因為前一卦的處境走到某個點，所以必然接下一卦。
整個序列是一個從天地開立走到事情永遠未完的大敘事。 讀完六十四卦之後還不通透的人，往往是漏了這一層，把六十四個卦 當成六十四個獨立條目來學，卻沒把它們當成一個連續故事的六十四個章節。
The 64 hexagrams are not a random list. From Hexagram 1 (Qian, Heaven) to Hexagram 64 (Weiji, Before Completion), every step has a stated reason, given by the Xugua Zhuan, the Discussion of the Sequence in the Ten Wings: because the previous hexagram's situation has reached a certain point, the next must follow.
The whole sequence is one narrative, from the founding of heaven and earth to the ever-incomplete. Readers who finish all 64 without reading systematically often miss this layer: they treat the hexagrams as 64 separate entries instead of 64 chapters of one continuous story.
《序卦傳》是什麼
《序卦傳》是十翼之一，傳為孔子所作，學界多認為戰國末至漢初才定稿。 內容是對六十四卦排序的一段連續文字解釋，每兩卦之間都給一句 「物不可以終某，故受之以某」式的因果連接。
這一傳的哲學立場是：六十四卦反映萬物的必然變遷， 盈必有虛、通必有否、聚必有散、完成必有新開始。 把六十四卦連起來，就是中國變化哲學的完整圖譜。
The Xugua Zhuan is one of the Ten Wings, traditionally attributed to Confucius, though most modern scholars date the received text to the late Warring States or early Han. It is a continuous prose commentary on the order: between every two adjacent hexagrams, a sentence of the form “nothing can end in X forever, therefore Y follows.”
Its philosophical stance: the 64 hexagrams reflect the necessary changes of all things. Fullness yields emptiness, flow yields blockage, gathering yields dispersion, and completion gives way to the next beginning. Read continuously, the sequence forms a complete map of the Chinese philosophy of change.
結構：三十二對，四對純錯，二十八對綜錯
六十四卦的排序不只是順一條線走，而是三十二組成對出現。 每一對的第二卦，是第一卦的綜卦，也就是六爻上下顛倒。
但有八個卦顛倒之後仍是自身，也就是自綜，沒辦法用綜來配對， 所以改用錯來配，也就是六爻全部陰陽互換。這八個卦形成四組純錯對：
其餘五十六卦兩兩互為綜卦對，共二十八對。整個六十四卦因此是三十二對， 這也是為什麼古人把易經看成一本成對之書，每讀一卦都要同時想到它的對偶。
The 64 hexagrams are arranged in 32 pairs. Each second hexagram in a pair is the inverse of the first, with the six lines flipped upside down. But 8 hexagrams are their own inverse, so they pair instead by opposite, with every line flipped from yin to yang. The four pure-opposite pairs are shown above. The remaining 56 hexagrams form 28 inverse pairs. Total: 32 pairs.
上經與下經：宇宙到人事
六十四卦在漢代已經分為上經、下經兩部分：
- 上經（一至三十）：以乾坤開端，以坎離收結。 主題是宇宙論，講天地、時序、根本力量。
- 下經（三十一至六十四）：以咸恆開端，以既濟未濟收結。 主題是人事論，講關係、社會、變革。
這不是兩本書，是一本書的兩個面向，先把宇宙的結構講清楚，再把人在此結構中的處境講清楚。 《繫辭傳》說：「天地設位，而易行乎其中。」易，就是兩經之間的那條線。
By the Han, the 64 hexagrams were already divided into an Upper Canon (1 to 30) and a Lower Canon (31 to 64). The Upper opens with Qian and Kun, heaven and earth, and closes with Kan and Li, water and fire; its theme is cosmology, the structures and forces of the world. The Lower opens with Xian and Heng, mutual influence and duration, and closes with Jiji and Weiji, after and before completion; its theme is human affairs: relationship, society, and transformation.
Not two books, but one book in two faces: cosmos first, then the human predicament inside that cosmos. The Xici Zhuan says: “Heaven and earth set the positions, and change moves between them.”
敘事的四個關節
整個六十四卦序列，可以用四個關鍵轉折來抓住主軸：
The entire sequence of 64 hexagrams can be grasped through four key pivots:
天地立，萬物生，第一個具體的卦是屯，也就是萌發之難。易經從困難開始，不從完美開始。
Heaven and earth are established, and the myriad things begin to be born. The first concrete hexagram is Zhun, the difficulty of sprouting. The Yi begins from the difficulty of beginning, not from perfection.
通泰之後必有閉塞，這是易經對一切順境的警示，盛極必反，沒有恆常不變的興盛。
After flourishing peace, stagnation must come. This is the Yi's warning to every era of prosperity: abundance does not last, and reversal is built into it.
上經以坎離，也就是險與麗這兩大力量收結。下經以咸開端，兩人之間的感應，是整個人事的起點。從自然力量到人的心，是六十四卦裡最大的轉折。
The Upper Canon ends with Kan and Li, pitfall and brightness, the two cosmic dynamics. The Lower opens with Xian, mutual influence between two people. The shift from natural forces to the human heart is the largest hinge in all 64 hexagrams.
易經不停在既濟，也就是已經過河、已經完成的狀態，它停在未濟，也就是尚未過河、還沒完成。中國哲學最深的一句話，也許就是序卦傳結尾那一句「物不可窮也」，萬物沒有窮盡的時候，所以必定以未濟收尾。完成之後，永遠還有下一個開始。
The Yi does not end at Jiji, after completion. It ends at Weiji, before completion. The deepest sentence in Chinese philosophy may be the one that closes the Xugua Zhuan: 'Nothing can be exhausted, hence Weiji, and there it ends.' Completion is always followed by another beginning.
《序卦傳》的關鍵接點
下面十四句是序卦傳中最具教學力的接點，每一句都解釋為何前卦必然過渡到後卦。
The 14 passages below are the most pedagogically useful transitions in the Xugua Zhuan, each explaining why the previous hexagram necessarily leads to the next.
有天地，然後萬物生焉。盈天地之間者唯萬物，故受之以屯。屯者盈也。
Heaven and earth exist, then the myriad things are born. The space between is filled, hence Zhun (difficulty at the beginning). Zhun means filling.
屯者物之始生也。物生必蒙，故受之以蒙。蒙者蒙也，物之穉也。
Zhun is the first stirring of things. What is just born is unenlightened, hence Meng. Meng is the youth of things.
履而泰，然後安。故受之以泰。泰者通也。物不可以終通，故受之以否。
Walking with care brings peace, hence Tai. Nothing can flow forever, so Pi (standstill) follows.
蠱者事也。有事而後可大，故受之以臨。臨者大也。
Gu is 'work to do.' Once there is work, one can grow, hence Lin (approach). Lin means greatness.
物不可以終盡，剝窮上反下，故受之以復。
Nothing can be wholly stripped away. Bo (splitting) at the top reverses below, hence Fu (return).
陷必有所麗，故受之以離。離者麗也。
Where there is pitfall, there must be attachment, hence Li. Li means attachment to brightness.
有天地然後有萬物，有萬物然後有男女，有男女然後有夫婦…夫婦之道不可以不久也，故受之以恆。
Heaven and earth give rise to things, things to man and woman, man and woman to husband and wife. The way of husband and wife cannot but endure long, hence Heng (duration).
困乎上者必反下，故受之以井。
What is hemmed in above must turn down, hence Jing (the well).
窮大者必失其居，故受之以旅。
Whoever exhausts greatness must lose their dwelling, hence Lyu (the wanderer).
有過物者必濟，故受之以既濟。
What exceeds must be ferried across, hence Jiji (after completion).
六十四卦文王序列
完整六十四卦在文王順序下的樣子，點任何一卦進入它的全文。 自綜卦，也就是純錯對的八個卦，以朱框標出。
The 64 hexagrams in King Wen order. Click any one to read the full text. The eight self-inverse hexagrams, the pure-opposite pairs, are marked with red borders.
想從別的角度看這六十四卦？ · 六十四卦總覽關係圖 · 按生活主題分組 · 按三爻之象分組
Want to view the 64 hexagrams from another angle? · Master graph (with relationships) · by life theme · by trigram image
練習·讀序
讀完上面之後，試著做這幾件事：
- 從第十一卦泰連讀到第十六卦豫，這六卦是一段通泰之後由衰轉振的完整小故事。 讀序卦傳給出的連接理由，看看古人怎麼把順境拆成六個階段。
- 讀第三十卦離到第三十一卦咸的過渡。為何易經把上經收在兩個自然力量，卻把下經開在兩個人身上？ 這個結構選擇本身，就是一種哲學立場。
- 讀第六十三卦既濟與第六十四卦未濟。為何不結在完成？「物不可窮也」這句話的力量， 在你的工作、關係、生命裡，是怎麼顯現的？
A few exercises after reading. Read Hexagrams 11 through 16 in sequence: the canonical six-stage arc from peace through complacency to its restoration. Read the transition from 30 to 31: why does the Yi end its cosmological canon on two natural forces, yet open the human canon on two people? That structural choice is itself a philosophical position. Read 63 and 64: why does the Yi end on incompletion? How does “nothing can be exhausted” appear in your own work, relationships, and life?