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I Ching Birth Hexagram · Hexagram 41 of 64

Hexagram 41, 損 Sǔn: the lake giving up its water to the mountain

損 Sǔn is hexagram 41 of the Zhouyi, which places a lake beneath a mountain, as if the lower water drained itself to raise the height above. The character means to decrease, and the tradition reads the hexagram as reduction given willingly, which is therefore not loss; its Judgment says two plain baskets are enough for an offering.

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Hexagram 41, 損 Sǔn, drawn as six lines numbered from the bottom: whole, whole, broken, broken, broken, whole. The lower, inner trigram is 兌 Duì, Lake; the upper, outer trigram is 艮 Gèn, Mountain. 1 2 3 4 5 6 Upper, outer 艮 Gèn, Mountain Lower, inner 兌 Duì, Lake 41 損 Sǔn Lines numbered from the bottom
The figure of 損 from the bottom line up: Lake inside, Mountain outside. Three broken lines, three whole.

Facts

Number
41 of 64, in the received order
Character and pinyin
損 Sǔn ䷨
Our title
Decrease
Lines, bottom to top
yang, yang, yin, yin, yin, yang
Lower trigram (inner)
☱ 兌 Duì, Lake
Upper trigram (outer)
☶ 艮 Gèn, Mountain
Within (nuclear)
24 復 Fù, Return
King Wen pair
42 益 Yì, Increase
Legge's name (1882)
Sun
Part of the text
The second part (下經), 31 to 64

Meaning

The lake lies at the foot of the mountain; one can picture it giving its water to the slope above it. The figure is read the same way: a line has moved from the lower trigram to the upper, the lower giving to the higher. 損 means to reduce or to take away, and the Judgment makes it depend on sincerity: with that there is great good fortune and freedom from error, and it adds that two plain baskets of grain may be used in the offering, since what counts is the feeling and not the quantity.

The Image names what is to be reduced in oneself: anger, which the superior man restrains, and desire, which he represses. In our own reading, 損 is subtraction chosen rather than suffered, the paring away that lets something more important grow. Its pair, hexagram 42, is the same six lines turned over: increase.

The lines

The first line drops its own affairs to help another, and is told to weigh how much it can give. The second gives "without taking from himself", in Legge's words, and is warned against acting. The third holds the hexagram's arithmetic: of three walking together, one is lost; one walking alone finds a friend. The fifth receives a gift of ten pairs of tortoise shells that cannot be refused, and the top line, like the second, increases others without diminishing itself.

Within 損 lies 復, hexagram 24; every line flipped gives 咸, hexagram 31.

In the birth cast

The time cast arrives at 損 when the year, month and day leave 7 on eight, which puts 艮 mountain above, and the same total with the hour added leaves 2, which puts 兌 lake 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 (初九) moving: becomes 4 蒙 Méng, The Untaught Mind
  • Line 2 (九二) moving: becomes 27 頤 Yí, Nourishment
  • Line 3 (六三) moving: becomes 26 大畜 Dà Xù, Great Restraint
  • Line 4 (六四) moving: becomes 38 睽 Kuí, Estrangement
  • Line 5 (六五) moving: becomes 61 中孚 Zhōng Fú, Trust at the Centre
  • Line 6 (上九) moving: becomes 19 臨 Lín, Drawing Near

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)
兌 pleased, open below; 艮 stopping, at rest above, in our English sourced
Trigram family places (Shuogua)
youngest daughter below, youngest son above sourced
Trigram body and animal images (Shuogua)
mouth and sheep below; hands and dog above sourced
Trigram phases (a classical correspondence: the Plum Blossom text's table)
Metal 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: 42 益 Yì, Increase; every line flipped: 31 咸 Xián, Mutual Influence sourced
Human Design gate
Gate 41, from 302° to 307.625° of the tropical zodiac on Ra Uru Hu's wheel (1987): a modern placing, not the I Ching's sourced
Our English title
Decrease: EsoTerrier's own, from the sense of 損 our construction

How the schools read it

The Zhouyi, in Legge's translation (1882)
“In (what is denoted by) Sun, if there be sincerity (in him who employs it), there will be great good fortune …”
The Image (大象), one of the Wings, in our paraphrase
A marsh at the foot of a mountain; the superior man restrains his anger and represses his desires.
The Plum Blossom method (Ming)
A figure reached by numbers: 艮 above when the year, month and day leave 7 on eight, 兌 below when the same total with the hour leaves 2.
Human Design (Ra Uru Hu, 1987)
Takes the number for its gate 41 and puts it on the zodiac; its own reading, which we do not quote.
EsoTerrier
The lake at the foot of the mountain: giving up from below to strengthen what is above; done sincerely, a decrease is not a loss, and what is cut back is anger and excess.

Claims about it

  • Gate 41 of Human Design, at 302° to 307.625° of the zodiac, is where the I Ching itself places hexagram 41.

    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 損 Sǔn 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.