Yì xiàng yì yán 易象意言
Discussions on the Meaning of the Yì’s Imagery
by 蔡淵 Cài Yuān (撰) — zì Bójìng 伯靜, hào Jiézhāi 節齋, 1156–1236, of Jiànyáng 建陽; eldest son of 蔡元定 Cài Yuándìng and elder brother of 蔡沈 Cài Shěn.
About the work
A one-juan companion-treatise to Cài Yuān’s Zhōuyì jīngzhuàn xùnjiě (KR1a0052), focused specifically on the xiàng (imagery) dimension of the Yì. The work is methodologically distinctive within the Zhū-school Yì-tradition for its explicit retention of the Hàn-ru hùtǐ 互體 (interlocking-trigram) technique within an otherwise Zhū-school yìlǐ framework.
The Sìkù tiyao gives an unusually programmatic statement of Cài Yuān’s methodological position:
Cài Yuān studied with Master Zhū, hence in [his] expounding of Yì*-principle [yìlǐ] he is more abundant; yet he does not discard the Hàn-ru hùtǐ doctrine, hence he discusses both imagery-and-numerology — also his family-line learning. The Yì uses imagery-and-numerology to lodge principle. The Jīng [Fáng] and Jiāo [Yǐ] line drifted into shùshù zhānhòu (mantic-numerology-and-prognostication) study, and indeed lost the sage’s original intent. From the time Wáng Bì’s Yì circulated, the ru set imagery-and-numerology aside and did not discuss them; and the so-called principle gradually drifted into empty talk also. Cài Yuān’s book uses* Yìxiàng as its title, yet what it discusses is throughout: by means of imagery, exhausting principle. So it can be called the Yì*-studies-able-to-strike-the-mean (néng zhuó qí zhōng zhě 能酌其中者).*
The Sìkù judgment “neng zhuó qí zhōng” — “[the Yì*-studies that] can take their stand at the mean*” — is unusually positive within the Sìkù tíyào’s Yì lèi. The work is treated as an exemplary execution of the program of yìlǐ-rooted-in-xiàngshù synthesis that the entire late-Sòng tradition was attempting to formulate.
The “family-line learning” reference is to Cài Yuándìng’s deep xiàngshù expertise (most fully expressed in the Yì xué qǐméng 易學啟蒙, the joint ZhūCài work). Where Cài Yuándìng emphasized the foundational xiàngshù in dialogue with Zhū Xī’s overall yìlǐ framework, Cài Yuān’s Yì xiàng yì yán takes the next step: applying the xiàngshù technique systematically to canonical-text reading without abandoning the yìlǐ anchoring.
The hùtǐ technique — reading the middle four lines of a hexagram as forming two overlapping derived trigrams (lines 2-3-4 as one trigram, lines 3-4-5 as another), so that each hexagram contains four trigrams (the upper and lower primary, plus the two interlocking) — was a Hàn-period xiàngshù technique that Wáng Bì had explicitly rejected. Cài Yuān’s restoration of the technique within a Zhū-school framework marks one of the cleaner reconciliations of Hàn and Sòng Yì methods.
Bibliographic state: the work was lost in independent transmission (“not transmitted in the world”); Zhū Yízūn’s Jīngyì kǎo registers it as already lost. The Sìkù editors recovered it from Yǒnglè dàdiǎn citations — and notably “head-and-tail complete” (shǒu wěi wán jù 首尾完具) — the recovered text is structurally complete, not a partial fragment. The Yǒnglè dàdiǎn base is “evidently the contemporary [SòngYuánMíng] secret-bureau old base” — i.e., the recovered text reflects an authoritative late-imperial archive copy.
The composition window 1200–1230 reflects Cài Yuān’s mature scholarly years post-Zhū-Xī (d. 1200) and post-Cài-Yuándìng (d. 1198), and prior to his own death in 1236. The work has no firm internal dating; it is plausibly contemporaneous with or slightly later than the Xùnjiě (KR1a0052, 1205 auto-preface).
Tiyao
We respectfully submit that Yì xiàng yì yán in one juan was composed by Cài Yuān of the Sòng. [Cài] Yuān is Cài Yuándìng’s son and Cài Shěn’s elder brother. He once studied with Master Zhū, hence in expounding Yì-principle he is more abundant; yet he does not discard the Hàn-ru hùtǐ doctrine, hence he speaks of both imagery-and-numerology — also his family-line learning.
For the Yì’s using imagery-and-numerology to lodge principle: the Jīng-and-Jiāo schools drifted into shùshùzhānhòu learning and so lost the sage’s original intent. From the time Wáng Bì’s Yì circulated, the ru set aside imagery-and-numerology and did not discuss them; and the so-called principle then gradually drifted into empty talk.
[Cài] Yuān’s book uses Yìxiàng as its title, yet all that is discussed is throughout: by means of imagery, exhausting principle. So it can be called the Yì-studies that can strike the mean.
There is no transmission-copy in the world; therefore Zhū Yízūn’s Jīngyì kǎo takes it as already lost. What the Yǒnglè dàdiǎn preserves is head-and-tail complete — evidently still the contemporary bìfǔ (secret-bureau) old base. We respectfully record and transmit it, that students of the Yì may have an evidential base.
Respectfully revised and submitted, fifth month of the forty-sixth year of Qiánlóng [1781].
General Compilers: Jǐ Yún 紀昀, Lù Xīxióng 陸錫熊, Sūn Shìyì 孫士毅. General Reviser: Lù Fèichí 陸費墀.
Abstract
Cài Yuān’s Yì xiàng yì yán is a methodologically self-conscious xiàngshù-rooted yìlǐ treatise — the kind of executed-and-balanced synthesis that the Zhū-school inherited as an unfulfilled program from Cài Yuándìng’s Yì xué qǐméng and Zhū Xī’s Zhōuyì běnyì. Where Zhū Xī had argued for the legitimacy of xiàngshù but had treated it lightly in actual exposition, Cài Yuān executes the program substantively: imagery is the medium through which principle is grasped.
The retention of the hùtǐ technique is the work’s most concrete xiàngshù commitment. Cài Yuān reads each hexagram as containing four trigrams (the two primary plus the two interlocking from the middle four lines), and consequently as exhibiting many more imageric-relationships than a Wáng-Bì-only reading would discern. The technique was widely used in the post-Yuán Yì tradition (Hú Yīguì, the Sìshū wǔjīng dàquán, etc.) and is restored in the present-day standard pedagogical repertoire.
The complementary relationship to the Xùnjiě (KR1a0052) is structural: the Xùnjiě is a running-gloss canon-and-commentary work; the Yì xiàng yì yán is a methodologically focused treatment of the imagery dimension. Read together, the two works give the substantive heart of Cài Yuān’s Yì-scholarship.
The Sìkù editors’ “can strike the mean” verdict places this work alongside Zhū Zhèn’s Zhōuyì jí zhuàn (KR1a0024), Xiàng Ānshì’s Zhōuyì wán cí (KR1a0038), and Lín Zhì’s Yì bì zhuàn (KR1a0045) as one of the methodologically balanced yìlǐ-and-xiàngshù synthesizers of the Southern Sòng. Within this group, Cài Yuān is the most explicitly Zhū-school-mainline figure.
The composition window 1200–1230 reflects Cài Yuān’s mature scholarly career; no internal dating fixes a tighter terminus.
Translations and research
No European-language translation. Treated principally as documentation of the Cài-school Yì-tradition.
- Hoyt Cleveland Tillman, Confucian Discourse and Chu Hsi’s Ascendancy (Univ. of Hawaii, 1992) — context for the Cài-school inheritance.
- Zhū Bóqūn 朱伯崑, Yìxué zhéxué shǐ, vol. 2 — Cài Yuān treated as the Cài-school xiàngshù-and-yìlǐ synthesizer.
- Wáng Tiějūn 王鐵均, Sòngdài Yìxué shǐ — chapter on the Cài-family Yì-tradition.
- Liào Mínghuó 廖名活, articles on the hùtǐ technique in Zhōuyì yánjiū.
- Modern punctuated editions on the Sìkù base.
Other points of interest
The reconciliation of Hàn-xiàngshù with Sòng-yìlǐ — accomplished here through the explicit retention of hùtǐ within a Zhū-school methodological frame — is one of the cleaner Sòng-period instances of self-conscious methodological pluralism. The Sìkù editors’ high praise reflects the Qīng-period evidential-studies preference for synthetic-and-evidential rather than purely-doctrinal Yì-readings.
The yú zhōng (striking-the-mean) self-positioning that the Sìkù tiyao assigns to Cài Yuān is methodologically interesting: the zhōng is not equidistant between xiàngshù and yìlǐ (which would be a content-balance), but is rather the methodological priority of using imagery to exhaust principle. The means is xiàngshù; the end is yìlǐ. This is a teleological rather than an equipollent synthesis.
The Cài-family family-line scholarly transmission — the jiā xué 家學 (family learning) reference — gives the work a distinctive lineage-pedagogy framing. Cài Yuān is teaching the family’s signature technique (the hùtǐ approach his father had developed) in the methodologically-articulated Zhū-school version that fitted post-1200 conditions.