Skip to content

I Ching Birth Hexagram · Hexagram 42 of 64

Hexagram 42, 益 Yì: wind and thunder strengthening each other

益 Yì is hexagram 42 of the Zhouyi, which sets wind over thunder, two forces that make each other stronger. The character means to increase or to benefit, and the figure is read as the upper trigram giving a line to the lower, the reverse of hexagram 41; its Judgment is favourable in every direction.

Is this your birth hexagram?

Draw your free chart: I Ching birth hexagram No email needed
Hexagram 42, 益 Yì, drawn as six lines numbered from the bottom: whole, broken, broken, broken, whole, whole. The lower, inner trigram is 震 Zhèn, Thunder; the upper, outer trigram is 巽 Xùn, Wind. 1 2 3 4 5 6 Upper, outer 巽 Xùn, Wind Lower, inner 震 Zhèn, Thunder 42 益 Yì Lines numbered from the bottom
The figure of 益 from the bottom line up: Thunder inside, Wind outside. Three broken lines, three whole.

Facts

Number
42 of 64, in the received order
Character and pinyin
益 Yì ䷩
Our title
Increase
Lines, bottom to top
yang, yin, yin, yin, yang, yang
Lower trigram (inner)
☳ 震 Zhèn, Thunder
Upper trigram (outer)
☴ 巽 Xùn, Wind
Within (nuclear)
23 剝 Bō, Stripping Away
King Wen pair
41 損 Sǔn, Decrease
Legge's name (1882)
Yî
Part of the text
The second part (下經), 31 to 64

Meaning

Where 損 has the lower trigram give to the upper, 益 turns the figure over: a line has come down from above to the lower trigram, the higher benefiting the lower. 益 means to add, to increase, to benefit, and the Judgment is wholly favourable: advantage in every move, and in the great crossing too.

The Image draws from wind and thunder a lesson in speed: when the superior man sees what is good he moves towards it, and when he has a fault he changes it. In our own reading, 益 is increase that flows downward and outward, generosity that makes others stronger. As always in the book, the top line marks the limit: increase that only takes and gives nothing back turns everyone against it.

The lines

The first line is given the strength for a great work; the second, like the fifth of 損, receives ten pairs of tortoise shells "whose oracles cannot be opposed", in Legge's English. The third is helped even through misfortune, if it is sincere; the fourth gives advice that is followed, and can be trusted with something as large as moving a capital. The fifth seeks with a sincere heart to benefit those below, and they recognise its goodness without being asked. The top line is the one whom no one helps and many attack, because its heart follows no rule.

Within 益 lies 剝, hexagram 23; its pair is 損, hexagram 41, and every line flipped gives 恆, hexagram 32.

In the birth cast

The time cast arrives at 益 when the year, month and day leave 5 on eight, which puts 巽 wind above, and the same total with the hour added leaves 4, which puts 震 thunder 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 20 觀 Guān, Looking Out
  • Line 2 (六二) moving: becomes 61 中孚 Zhōng Fú, Trust at the Centre
  • Line 3 (六三) moving: becomes 37 家人 Jiā Rén, The Household
  • Line 4 (六四) moving: becomes 25 无妄 Wú Wàng, Without Pretence
  • Line 5 (九五) moving: becomes 27 頤 Yí, Nourishment
  • Line 6 (上九) moving: becomes 3 屯 Zhūn, First Shoots

Lines 2 to 5 give the hexagram within, 23 剝 Bō, Stripping Away. 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)
震 moving, startling below; 巽 entering, pervading above, in our English sourced
Trigram family places (Shuogua)
eldest son below, eldest daughter above sourced
Trigram body and animal images (Shuogua)
feet and dragon below; thighs and fowl above sourced
Trigram phases (a classical correspondence: the Plum Blossom text's table)
Wood below, Wood 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: 41 損 Sǔn, Decrease; every line flipped: 32 恆 Héng, Constancy sourced
Human Design gate
Gate 42, from 20.75° to 26.375° of the tropical zodiac on Ra Uru Hu's wheel (1987): a modern placing, not the I Ching's sourced
Our English title
Increase: EsoTerrier's own, from the sense of 益 our construction

How the schools read it

The Zhouyi, in Legge's translation (1882)
“Yî indicates that (in the state which it denotes) there will be advantage in every movement which shall be undertaken, that it will be advantageous (even) to cross the great stream.”
The Image (大象), one of the Wings, in our paraphrase
Wind and thunder together; the superior man moves towards the good he sees and turns from his errors.
The Plum Blossom method (Ming)
A figure reached by numbers: 巽 above when the year, month and day leave 5 on eight, 震 below when the same total with the hour leaves 4.
Human Design (Ra Uru Hu, 1987)
Takes the number for its gate 42 and puts it on the zodiac; its own reading, which we do not quote.
EsoTerrier
Wind and thunder together, each giving the other force: a time when giving from above makes everything below grow, and when one moves quickly towards what is good and away from one's faults.

Claims about it

  • Gate 42 of Human Design, at 20.75° to 26.375° of the zodiac, is where the I Ching itself places hexagram 42.

    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 益 Yì 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.

Your I Ching reading, $4.99. Includes this system's raw data. Written for you by AI. Read a sample. Charts and the written text are free in every account.

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.