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I Ching Birth Hexagram · Hexagram 4 of 64

Hexagram 4, 蒙 Méng: the spring at the mountain's foot, and the teacher's rule

蒙 Méng is hexagram 4 of the Zhouyi, which puts water under a mountain: a spring that has not yet found its course. The character means covered or dim, and the Judgment turns on teacher and pupil, including the rule that the oracle answers the first sincere question and not the same one asked again.

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Hexagram 4, 蒙 Méng, drawn as six lines numbered from the bottom: broken, whole, broken, broken, broken, whole. The lower, inner trigram is 坎 Kǎn, Water; the upper, outer trigram is 艮 Gèn, Mountain. 1 2 3 4 5 6 Upper, outer 艮 Gèn, Mountain Lower, inner 坎 Kǎn, Water 4 蒙 Méng Lines numbered from the bottom
The figure of 蒙 from the bottom line up: Water inside, Mountain outside. Four broken lines, two whole.

Facts

Number
4 of 64, in the received order
Character and pinyin
蒙 Méng ䷃
Our title
The Untaught Mind
Lines, bottom to top
yin, yang, yin, yin, yin, yang
Lower trigram (inner)
☵ 坎 Kǎn, Water
Upper trigram (outer)
☶ 艮 Gèn, Mountain
Within (nuclear)
24 復 Fù, Return
King Wen pair
3 屯 Zhūn, First Shoots
Legge's name (1882)
Măng
Part of the text
The first part (上經), 1 to 30

Meaning

A spring rising at the foot of a hill does not yet know which way it will run. That is the picture the two trigrams make, water below and mountain above, and the character 蒙 adds its own sense: covered, dim, not yet clear. The tradition reads the hexagram as inexperience, the state before learning, and it is careful not to make that an insult. It is a stage, and the text is about how to pass through it.

The Judgment speaks in the first person, as the teacher or the oracle itself: I do not go looking for the inexperienced; they come to me. When they ask with the sincerity of a first consultation, they are taught; if they ask a second and a third time, that is troublesome, and "I do not instruct the troublesome". It is one of the few places where the book describes its own use, and diviners have quoted it ever since as the reason not to cast the same question twice. The Image draws from the spring a different lesson: act decisively and keep feeding one's character, as the water keeps feeding the stream.

The lines

The lines show teaching from both sides. The first speaks of loosening the shackles from the mind, and warns that discipline pushed further brings regret; the second is the patient teacher who bears with the ignorant, and the line ends with a son who can run the household. The fourth is a mind bound by its own ignorance, the fifth "a simple lad without experience", in Legge's English, to whom the text gives good fortune. The top line strikes at ignorance, and Legge's text adds that advantage lies in warding off injury rather than doing it.

Within 蒙 lies 復, hexagram 24, the return; its pair is 屯, hexagram 3, of which it is the inverse.

In the birth cast

The time cast arrives at 蒙 when the year, month and day leave 7 on eight, which puts 艮 mountain above, and the same total with the hour added leaves 6, which puts 坎 water below. Which line moves depends on what the whole total leaves on six, and each line turns the figure into a different hexagram:

  • Line 1 (初六) moving: becomes 41 損 Sǔn, Decrease
  • Line 2 (九二) moving: becomes 23 剝 Bō, Stripping Away
  • Line 3 (六三) moving: becomes 18 蠱 Gǔ, Repairing Decay
  • Line 4 (六四) moving: becomes 64 未濟 Wèi Jì, Not Yet Across
  • Line 5 (六五) moving: becomes 59 渙 Huàn, Scattering
  • Line 6 (上九) moving: becomes 7 師 Shī, The Army

Lines 2 to 5 give the hexagram within, 24 復 Fù, Return. Everyone born in the same lunar day and double hour has the same cast, so the figure describes a moment, not a person.

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.

Trigram virtues (Shuogua, chapter 7)
坎 sinking, perilous below; 艮 stopping, at rest above, in our English sourced
Trigram family places (Shuogua)
middle son below, youngest son above sourced
Trigram body and animal images (Shuogua)
ears and pig below; hands and dog above sourced
Trigram phases (a classical correspondence: the Plum Blossom text's table)
Water below, Earth above. The Han assignment of 梅花易數, book 1, also used by Jing Fang; not stated as such in the Zhouyi sourced
Inverse and opposite
Upside down: 3 屯 Zhūn, First Shoots; every line flipped: 49 革 Gé, Changing the Hide sourced
Human Design gate
Gate 4, from 138.875° to 144.5° of the tropical zodiac on Ra Uru Hu's wheel (1987): a modern placing, not the I Ching's sourced
Our English title
The Untaught Mind: EsoTerrier's own, from the sense of 蒙 our construction

How the schools read it

The Zhouyi, in Legge's translation (1882)
“I do not (go and) seek the youthful and inexperienced, but he comes and seeks me.”
The Image (大象), one of the Wings, in our paraphrase
A spring issuing at the foot of a mountain; the superior man acts resolutely and nourishes his virtue.
The Plum Blossom method (Ming)
A figure reached by numbers: 艮 above when the year, month and day leave 7 on eight, 坎 below when the same total with the hour leaves 6.
Human Design (Ra Uru Hu, 1987)
Takes the number for its gate 4 and puts it on the zodiac; its own reading, which we do not quote.
EsoTerrier
A mind not yet taught, and the chance to learn; asked once in earnest the oracle answers, asked again and again it falls silent.

Claims about it

  • Gate 4 of Human Design, at 138.875° to 144.5° of the zodiac, is where the I Ching itself places hexagram 4.

    false

    What the record shows: The wheel is Shao Yong's circle rotated by Ra Uru Hu in 1987 to 1989 so that hexagram 41 starts at 2° Aquarius. No Chinese source we found puts the hexagrams on degrees of the zodiac.

  • Being born under 蒙 Méng fixes a person's character.

    unverified

    What the record shows: A modern reading with no source in the tradition. The Zhouyi has no birth hexagram; the cast reads a figure, not a person, and everyone born in the same lunar day and double hour shares it.

Elsewhere on EsoTerrier

Sources

Primary texts (6)
  1. James Legge (trans.), The Yî King, Sacred Books of the East XVI. Oxford: Clarendon Press, 1882. Public domain; quoted briefly and credited. en.wikisource.org/wiki/Sacred_Books_of_the_East/Volume_16
  2. 梅花易數 (Meihua yishu, the Plum Blossom method), attributed to Shao Yong, book 1: the time rule, the trigram numbers and phases, and the casts of the plum blossom and the peonies. zh.wikisource.org/wiki/梅花易數/卷一
  3. 周易 (Zhouyi), the received Chinese text of the hexagram and line statements with the Ten Wings. ctext.org/book-of-changes
  4. The same, the 1882 Oxford edition scanned (archive.org), for hexagrams 33 to 64 and the appendices. archive.org/details/sacredbooksofchi16conf
  5. The Unicode Standard, Yijing Hexagram Symbols, U+4DC0 to U+4DFF. unicode.org/charts/PDF/U4DC0.pdf
  6. 京氏易傳 (Jingshi yizhuan), attributed to Jing Fang, three books. zh.wikisource.org/wiki/京氏易傳
Studies and other sources (3)
  1. "King Wen sequence", Wikipedia. en.wikipedia.org/wiki/King_Wen_sequence
  2. Jovian Archive, "Gates and hexagrams in Human Design" (cited for the wheel's origin only). jovianarchive.com/pages/gates-and-hexagrams-in-human-design
  3. "Hexagram (I Ching)", Wikipedia. en.wikipedia.org/wiki/Hexagram_(I_Ching)
Our own research (5)
  1. EsoTerrier, I Ching research, 10 to 14 October 2026: the method, the validation (61 births), the variants and the lists.
  2. EsoTerrier calculation engine, the I Ching service and its reference tables (titles, glosses and readings our own).
  3. EsoTerrier, Gene Keys research, 9 October 2026: the legal and trade-mark report, on which hexagram names are free to use.
  4. EsoTerrier, Human Design research, 9 October 2026: the wheel, gate 41 at 2° Aquarius, 5.625° per gate.
  5. EsoTerrier, engine audit of 14 October 2026: the reworded titles, readings and trigram qualities, with the passages each rests on.

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By EsoTerrier. Written with AI assistance from our research and checked against its sources; last revised 19 October 2026. How we write these pages.

First published ; last revised . Corrections: support@esoterrier.com.