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天乙者，乃天上之神，在紫微垣、阊阖门外，与太乙并列，事天皇大帝，下游三辰，家在己丑斗牛之次，出乎己未井鬼之舍，执玉衡较量天人之事，名曰在乙也。其神最尊贵，所至之处，一切凶煞隐然而避。
《壶中子》云：贵人分治昼夜，各自专权，以昼生遇昼贵，夜生遇夜贵，为得力。或以子后为昼，午后为夜；或以日出为昼，日入为夜，皆是臆说。不若只以寅申分阴阳，冬至后用阳贵，夏至后阴贵。人命一阳生后遇阳贵为得力，一阴生后遇阴贵为得力。《三车一览》则以甲阳木乘少阳之气生乎东方，至巳而用事毕矣，故退藏于未而为贵。庚阳金乘少阴之气而生乎西，至亥而用事毕矣，故退藏于丑而为贵。戊阳土冲和中央播于四时，甲因之，万物生；庚因之，万物成，则生成之理毕矣。乙乃阴木，己乃阴土，二位无气失类而无所居，必待申子生旺水土滋养充实补助不足，此二者喜见申子而为贵。丙丁之火当盛夏至酷而害万物，性熄于酉，藏于亥，以西北成齐之气而和，此二者以酉亥阴气和而为贵。壬癸之水至穷冬则其性严而杀万物，惟啬于卯，潜于巳，以东南温燠之气而和，此二者以巳卯阳气和而为贵。辛乃阴金，执方不能自化，须假寅午生旺之火锉刚革而成形为贵。《广录》云：甲阳木、戊阳土、庚阳金，皆喜土位。未者，土之正位；丑者，土安静之地，所以牛羊为贵。细分之，甲尤喜未，庚尤喜丑，各归其库也，戊子、戊寅、戊午喜丑，丑者、火人胎养之乡，戊辰、戊申、戊戌喜未，未者，木人之库，土人生旺之位也。乙者，阴木；巳者，阴土，阴土喜生旺，阴木爱阳水，所以鼠猴为贵。然乙尤喜子，子者，水之旺乡；己尤喜申，申者，坤之正位。丙丁属火，火墓在戌；壬癸属水，水墓在辰。辰戌，魁罡之地，贵人不临，故寻寄火贵于酉亥，寄水贵于卯巳，皆归根复命之乡。六幸阴金，喜阳火生旺之地，故以马虎为贵。更宜以纳音互换。推寻须比和，则其贵为福，若丙火得酉，火至此死，焉足贵哉！
阎东叟云：论天乙贵，须就五行喜忌，如甲人有戊有庚，得癸未、乙丑，遇二吉而带印为上，遁见丁丑、辛未者次之，乃三阴喜在印库。乙人得戊申、庚子生旺之土，己人得甲申、丙子生旺之水，此阴木阴土喜于财旺。丙丁得丁酉、乙亥，壬癸得乙卯、癸巳。此水火不嫌死绝。六辛得丙寅、丙午，此阴金不嫌鬼胜，得二为上，得一次之。《紫虚局》以此为贵人入庙，遇者主金紫贵。
《八字金书》论贵神，又分优劣，即前六十甲子吉凶，其归要与禄、马同窠，不犯交退，伏神，支干相合为贵，紧要在月日时支干相合。
林开论天乙相合，如甲子见己未，无死绝、冲破、空亡，更有福神助，至贵。如犯上忌减力，又多难无福。戊子见己丑，不犯上忌，更有福助，此为次格。有死绝减力，有冲破、空亡，风尘吏也。辛未见庚寅，不犯上忌，有福助，为第三等；死绝减力，冲破、空亡，平生多难，卑冗官耳。
阎东叟论贵合贵食，如甲得己丑、己未，戊得癸丑、癸未，庚得乙丑、乙未，乙得庚子、庚申，己得甲子、甲申，丙得辛酉、辛亥，丁得壬寅，壬辰，如此类谓之贵合。甲食丙，乙食丁，丙丁贵在酉亥，甲得丙寅、丙辰，乙得丁酉、丁亥；庚食壬，辛食癸，壬癸贵在卯巳，庚得壬申、壬戌，辛得癸卯、癸巳，如此类谓之贵食。有贵合则官多荣显，有贵食则禄多称意，三者兼之，官高禄重。
《三命提要》以天乙在贵神六合上，如甲戊庚在子午，则子合丑，午合未。乙己在丑巳，丙丁在寅辰，壬癸在申戌，辛在未亥，皆主大福，遇两合以上尤贵。
《宝鉴》有天乙扶身，取贵人夹拥太岁，如壬寅人得甲寅日时，壬贵在卯，甲癸在丑夹拥乎寅，丙申人得戊申准此。入贵格，别无刑冲，主一生少病，早年享福；常格得之，终身无刑狱之灾。
有干夹贵神，如甲戊庚人得丑未，日时上却带甲戊庚一字，主显异。
《指南》有夹贵逢六合，如壬癸人见辰而得癸酉合，丙丁人见戌而得丁卯合，取前后各有天乙贵，更禄马临身，主大富贵。
有福星贵人，如一命，壬子、癸卯、庚戌、庚辰，壬骑龙背；又贵在卯巳，得辰是福星扶贵人也。
《烛神经》曰：“天乙贵遇生旺，则形貌轩昂性灵颖悟，理义分明，不喜杂术，纯粹大器，身蕴道德，众人钦爱。死绝则执拗自是，喜游近贵。与劫煞并，则貌厚有威，多谋足计。与官符并，则文翰飘逸，高谈雄辩。与建禄并，则文翰纯实，济惠广游，君子人也。若落天中或与天中合，或与天中连珠，当有伶伦之态，好呕吟，伎艺人也。
又曰：天乙贵，三命中最吉之神。若人遇之则荣，功名早达，官禄亦易近。如三命皆乘旺气，终登将相公侯之位。大小运行年至此，亦主迁官进财，一切加临，至此皆为吉兆。凡贵人所临之处，大概喜生旺，无冲破，道理顺，不落空亡，天干纳音偕和，更得禄马而昼夜不背。或年时互换贵，如甲午人见辛丑时，丙申见己亥之类。或四干并在一支上见贵，如丑未生而得甲戊庚之类。或四位天干通聚贵，地支为五行聚贵。更遇天月二德为佳。《理愚歌》云：“贵人或落空亡里，禄马背违如不值。”《宝鉴》云：“贵人无气，虽有如无。”《洞玄经》云：“贵人嗔则凶来。”可见命中有贵，不可就为吉论，要当细详。
The Heavenly Yi Nobleman is the most revered deity in the heavens 🌌, residing outside the Ziwei Enclosure and the Changhe Gate, alongside the Taiyi star, serving the Celestial Emperor. It patrols the three luminaries (sun, moon, stars), has its home at Jichou (corresponding to the Dou and Niu lunar mansions), appears and disappears at Jiwei (corresponding to the Jing and Gui lunar lodges), and governs human affairs. Wherever it arrives, malignant influences retreat 🔥.
The Nobleman is divided into day and night: the Day Nobleman is active after the Yin hour, the Night Nobleman after the Shen hour; the Yang Nobleman is used after the Winter Solstice, the Yin Nobleman after the Summer Solstice. In destiny analysis, the Yang Nobleman encountering Yang birth and the Yin Nobleman encountering Yin birth are most potent 🌱. The Five Elements' preferences and aversions determine the Nobleman's branch positions:
The Nobleman requires harmony with the Na Yin Five Elements and fears death/exhaustion, clash, or breach. For example, Bing Fire encountering You (Fire's death) does not confer nobility; a Jia person meeting Guichou or Yichou (with Seal) is highly auspicious, while encountering Dingchou or Xinwei is secondary.
The Nobleman is enhanced when combined with other elements:
The Nobleman's state influences temperament: prosperous and vigorous brings dignity and intelligence 🎯; death/exhaustion leads to stubbornness and self-reliance; combined with Robbery Sha brings resourcefulness; with Official Seal brings eloquence; with Establishing Salary brings gentlemanly demeanor. If falling into Void or Tianzhong star, one may easily become a skilled artisan 🎭.
Although auspicious, the Nobleman requires prosperity without clash/breach, not falling into Void, and obtaining Salary and Horse without contradicting day/night cycles. Interchanging Nobility (e.g., Jiawu meeting Xinchou hour) or four Heavenly Stems gathering Nobility is even better. The Li Yu Ge cautions: a Nobleman in Void leads to Salary and Horse contradictions; the Dong Xuan Jing warns: an angered Nobleman can summon misfortune ⚡.
Destiny example: One's Eight Characters: Renzhi, Guimao, Gengxu, Gengchen. Ren rides the Dragon's back, nobility is in Mao and Si, Chen as the Fortune Star supports the Nobleman.
The Heavenly Yi Nobleman symbolizes a protective force in the cosmos, based on the interactions of the Five Elements (🔥🌊🌳⚔️⛰️) and the balance of Yin and Yang (day/night, Winter/Summer Solstice). It emphasizes that the Nobleman must be "prosperous and unbreached"—meaning its energy is abundant and undisturbed—to resolve misfortunes and bring opportunities. Essentially, it is an ancient crisis buffer mechanism constructed through celestial phenomena and the Heavenly Stems and Earthly Branches.
In contemporary society, the concept of the Nobleman can be translated into a tool for managing relationships and opportunities:
The Nobleman theory reveals the dialectic of chance and necessity: the Nobleman arrives "randomly" (like stellar movement) yet requires "necessary" conditions (Five Elements harmony). In a modern context, this reminds us: opportunity (Nobleman) favors the prepared (prosperous state), but blind reliance (superstitiously trusting a Nobleman in death/exhaustion) invites loss. At its core, it contemplates humanity's insignificance yet agency within the cosmos—revering natural laws without succumbing to fatalism.
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