Wù 戊, the yang Earth day master of BaZi

Wù 戊 is the fifth Heavenly Stem, yang Earth, and the day master of any BaZi chart whose day stem it is. The classical images make it the mountain, with mist and the rosy cloud above it. The 滴天髓 calls it solid and heavy, central and upright, the earth that governs the life of everything. As a day master it is rooted in 辰, 戌, 寅, 巳 and 申 and combines with 癸.

Meaning

The 滴天髓 gives each stem a verse of eight short lines. For 戊 it reads, in the 輯要 text:

戊土固重，既中且正，靜翕動闢，萬物司命，水旺物生，火燥囍潤，若在坤艮，怕沖宜靜。

In our translation: Wù earth is solid and heavy, both central and upright. Closed when still and open when it moves, it governs the life of all things. When water flourishes, things grow; in fiery dryness it longs for moisture. Set in 坤 or 艮, it fears a clash and wants stillness.

坤 and 艮 stand here for the branches 申 and 寅, where a clash would shake its root. The older commentary beside the verse, the 原注, calls 戊 the higher, harder earth from which the softer 己 comes. 任鐵樵's edition reads the third couplet differently: with moisture things grow, in fiery dryness they sicken.

The 三命通會 makes 戊 mist in heaven and the mountain on earth: hard earth, glad of yang fire and robbed by yin metal, born in 寅 and at its weakest in 酉, where metal drains it. Its sky image is the rosy cloud, which exists only by the sun. The 窮通寶鑑 says that the 戊 of spring is not alive without 丙 to warm it, not loosened without 甲, and grows nothing without 癸 to moisten it.

Our chart calls 戊 a mountain: stable, reliable, patient and grounded, with stubbornness and a fear of change as its cost. The mountain is also a classical image, but the one-word version is EsoTerrier's modern simplification, labelled as ours.

In a chart

A 戊 day master has roots wherever 戊 is hidden in a branch: 寅 Yín (residual qi), 辰 Chén (main qi), 巳 Sì (residual qi), 申 Shēn (residual qi), 戌 Xū (main qi). Its 祿, the branch where its qi comes into office (臨官), is 巳; the branch after it, 午, is its blade (陽刃). It is born (長生) in 寅 and, as a yang stem, runs the twelve stages forward from there; the stages are phases of its qi.

It combines with 癸 Guǐ (天干五合), a pair the 三命通會 calls 無情之合 (the heartless match), leaning to Fire; as an Earth stem it has no clash among the stems. Its own phase is strongest in the last month of each season.

To a 戊 day master the ten stems are: 甲 Seven Killings (七殺); 乙 Direct Officer (正官); 丙 Indirect Resource (偏印); 丁 Direct Resource (正印); 戊 Friend (比肩); 己 Rob Wealth (劫財); 庚 Eating God (食神); 辛 Hurting Officer (傷官); 壬 Indirect Wealth (偏財); 癸 Direct Wealth (正財). A second 戊 elsewhere in the chart is a Friend; the day stem itself is the Day Master and is not one of the Ten Gods.

What this page leaves out

The classical chapters on 戊 also say, in the idiom of their age, what such a chart means for rank, kin, marriage and fortune. We record that they do and repeat none of it. Nor do we say whether a 戊 day master is strong or weak, or which useful god it needs: the tradition weighs both, and EsoTerrier computes neither.

Correspondences

Each item with how it stands: “sourced” is in the work cited, “our construction” is EsoTerrier’s own, and “disputed” means the sources disagree.

Opening of the 滴天髓 verse: 「戊土固重」 sourced
Sky image, 三命通會: The rosy cloud (霞) sourced
In heaven and on earth, 三命通會: In heaven mist, on earth the mountain (在天為霧，在地為山) sourced
The first month, 窮通寶鑑: Spring 戊 is not alive without 丙 to warm it, not quickened without 甲 to loosen it, and grows nothing without 癸 to moisten it (三春戊土) sourced
Combination, 三命通會: With 癸: 無情之合 (the heartless match) sourced
Nobleman star (天乙貴人): 丑 and 未; a symbolic star we do not chart yet sourced
Academic star (文昌): 申; a symbolic star we do not chart yet sourced
Our image, traits and challenge: Mountain: stable, reliable, patient and grounded; its challenge: stubbornness, and a fear of change our construction
Mountain as the classical meaning: A modern image; the classics give the ones above disputed
First meaning of the character: Uncertain; the stems are first attested as day names of the Shang week disputed

How the schools read it

滴天髓, the verse: Solid, central earth that governs the life of things, wanting moisture and stillness. Attributed to 京圖 of the Song or to Liu Bowen; one edition study dates the text mid-Ming or later.
任鐵樵, 滴天髓闡微 (after 1820): Reads 水潤物生，火燥物病, "with moisture things grow, in fiery dryness they sicken", and 艮坤 for 坤艮.
三命通會 (Ming): Mist and the mountain; hard earth glad of yang fire; the rosy cloud.
窮通寶鑑 (Qing): Spring earth that needs sun, wood and rain before anything grows.
Modern English teaching: The one-word image, a mountain, a simplification of the classical images.
EsoTerrier: Shows a mountain as its own image, labelled, beside the texts.

Claims about it

"Mountain" is the traditional meaning of 戊, and the whole of it.
disputed

What the record shows: The 三命通會 does give the mountain, with mist and the rosy cloud; the 滴天髓 gives a temper and a role. The one-word image is a simplification, and ours on the chart.
The day stem is itself a Ten God, the Friend (比肩).
false

What the record shows: A 戊 in another pillar is a Friend to a 戊 day master; the day stem itself is the reference point, labelled Day Master (日主) by every tool we surveyed.
A 戊 day master can be scored strong or weak, and its useful god computed.
disputed

What the record shows: The classics ground the useful god in at least four different ways. EsoTerrier computes neither the strength nor the useful god.
The classical chapters on 戊 tell a person's rank, marriage and length of life.
told as lore

What the record shows: The texts do make such pronouncements, in the idiom of their age. We take only their images and the logic of the phases.

Elsewhere on EsoTerrier

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Wù 戊, yang Earth: the mountain that governs all things

Facts