Hexagram 42 Yi (Increase) — Trigram Structure & Line Overview
Trigram Structure Upper: Wind (Xun ☴) · Lower: Thunder (Zhen ☳)
Sequence & Paired Hexagram ← #41 Sun · #43 Guai → · Pair: #41 Sun

Classical Image Maxim: "Wind and thunder invigorate; embrace goodness and mend faults." — Already cast Hexagram 42 Yi with one or more changing lines (Lines 1 to 6)? Look up your exact moving-line combination in the Hexagram 42 Yi Lookup Tool, browse all 64 I Ching hexagrams, or map a career decision:

Hexagram 42: Yi (Increase)
King Wen #42 Wind & Wood ☴ Over Thunder ☳
Upper Trigram (Outer)
Xun / Wind & Wood ☴
Gentle Penetration · Gradual Influence
Lower Trigram (Inner)
Zhen / Thunder ☳
First Motion · Awakening Impulse
Line 6 · Top Yang
Seeking Gain Alone Draws Blows
Line 5 · 5th Yang ★
Kindness That Needs No Question
Line 4 · 4th Yin
Moving the Seat in Balance
Line 3 · 3rd Yin
Enriched Through Hardship
Line 2 · 2nd Yin
Ten Pairs of Tortoise Shells
Line 1 · 1st Yang
Undertaking a Great Work
The Great Image: "Wind and thunder invigorate; embrace goodness and mend faults."

Hexagram 42 Meaning & Interpretation

In the received King Wen sequence of the Book of Changes (Zhouyi), Hexagram 42 — Yi (Increase) is the 42nd six-line figure, formed by placing the upper trigram Wind/Wood (Xun ☴) above the lower trigram Thunder (Zhen ☳). It forms a structural pair with Hexagram 41 (Sun, Decrease), contrasting their complementary stages of change across the sixty-four hexagrams.

The classical Judgment (gua ci) and the Great Image (da xiang) read the interaction between outer Wind/Wood (Xun ☴) and inner Thunder (Zhen ☳) as an integrated pattern of timing and conduct. The Great Image states: "Wind and thunder invigorate; embrace goodness and mend faults." In classical commentary, the Judgment names the macro climate sitting before you, while the Image describes how a discerning person (junzi) aligns daily posture with that climate before examining any individual moving lines.


Hexagram 42 Unchanging (No Changing Lines)

When all six positions come out settled — only 7s and 8s, with no moving 6 or 9 — the figure is a static hexagram (jing gua). Following Zhu Xi's rule in the Zhouyi Benyi, there is no relating figure and no moving line statement; the reading rests on the Judgment (gua ci) and the Great Image (da xiang) of Hexagram 42. Unlike the first two hexagrams, Yi has no seventh all-moving statement, so an unchanging cast describes a fertile window of expansion and shared benefit.

Structurally, Yi places Wind (Xun, ☴) above Thunder (Zhen, ☳), and in the classical trigram exchange it represents the upper ruler diminishing itself to strengthen the lower foundation. Wind and thunder reinforce each other: wind carries the sound of thunder further, and thunder stirs the air for the wind. The Judgment states that it is favorable to undertake purposeful commitments and cross the great stream because the momentum is constructive and outward-flowing.

The Great Image turns external tailwinds into personal growth: "Wind and thunder invigorate; embrace goodness and mend faults." When you see a strength, adopt it immediately; when you spot a fault in yourself, correct it without delay.

  • Are you using this supportive window for a meaningful commitment? Favorable momentum is meant to be invested in lasting work rather than squandered on comfort.
  • How are you sharing the gain with the people who form your foundation? In the architecture of Yi, increase lasts only when the base below is strengthened.
  • What personal habit can you upgrade while energy is high? Emulate what works and shed what drags you down.

Hexagram 42 in Love & Relationships

In questions of love and partnership, Hexagram 42 is one of the most generous figures in the Zhouyi: a time when mutual encouragement, shared projects, and emotional generosity amplify both partners. Inverting Hexagram 41 (Sun, Decrease), Yi shifts the rhythm from paring back to pouring warmth into the foundation of the bond. When cast unchanging, it favors taking a meaningful step forward together — deepening commitment, building a shared life, or supporting each other's growth with an open hand.

When individual lines move, the six positions show how generosity builds — or, at the very top, forfeits — relationship trust:

  1. First position — Favorable to undertake great work when the foundation is blessed: Newly received warmth or support in a relationship is best honored through wholehearted action and dependable follow-through rather than passive complacency.
  2. Second position — Enriched by ten pairs of tortoise shells through steady receptivity: When you remain open, grounded, and genuine, a partner's care and life's good turns meet you naturally without manipulation.
  3. Third position — Enriched through difficult events; walk in the center with sincerity: Even a hard shared experience or awkward truth can deepen a bond if both partners handle it with candor and accountability rather than blame.
  4. Fourth position — Walking in the center and relocating the capital to serve the whole: A major adjustment — moving, shifting schedules, or reorganizing priorities — succeeds when done for the genuine wellbeing of both partners.
  5. Fifth position — With a sincere and kind heart, do not even ask; supreme steadiness: The heart of Yi in love: when care is given freely without strings or hidden invoices, mutual devotion becomes unshakable.
  6. Top position — Bringing increase to no one, while someone strikes from outside: A sharp closing warning: turning selfish, demanding, and inconsistent inside a relationship eventually exhausts every reservoir of goodwill.

Questions to sit with:
- Where can you pour encouragement or practical help into your partner's foundation right now?
- Is your generosity coming from a whole heart (Line 5) or from an expectation of payback?
- How do the seasons of giving in Yi and simplifying in Hexagram 41 (Sun) balance each other in your bond?


Hexagram 42 in Career & Decisions

Hexagram 42 (Yi) establishes the structural physics of value transference, counter-cyclical capital allocation, and explosive systemic scaling. Above sweeps Xun (the distributing gale); below surges Zhen (unbridled kinetic thunder). The fundamental axiom of Yi is revolutionary: "Diminish the upper to enrich the lower".

When entrenched elites voluntarily relinquish margin surcharges to subsidize frontline operators, developers, and users, systemic velocity explodes ("The people rejoice without bounds; the advance is borderless"). Yi establishes three immutable expansion doctrines:
1. **Executing Massive Strategic Architecture **: Flush with venture capital and windfall wind, mediocre firms stockpile cash unproductively. Sovereign operators mobilize capital instantly to build generational infrastructure moats.
2. **Counter-Cyclical Transformation via Crisis **: Structural adversity, supply shocks, and industry crashes ("Disastrous affairs") provide the unique political window required to dissolve legacy bureaucracy and execute strategic migration ("Relocating the capital").
3. The Catastrophe of Predatory Monopolies (Line 6): Extraction masquerading as platform governance guarantees terminal ruin. Extracting unearned rent from helpless participants prompts coordinated defection and sovereign antitrust destruction ("None enriches him; some strike him").

The Six Lines of Hexagram 42

1. Line 1 (Initial Yang): Using Increase to Undertake a Great Work.

li yong wei da zuo, yuan ji, wu jiu — "it furthers one to undertake a great work; the most favorable outcome, and no blame."

Ordinarily the bottom line of a hexagram lacks the standing to launch a major undertaking. Here, however, the fourth line above generously pours strength down into the first position. Because this rare windfall of support is real, using it boldly for a substantial, worthwhile work honors the gift and avoids fault.

This line asks: now that real support has been entrusted to you, what substantial work will you build with it?

2. Line 2 (Second Yin): Bestowed with Ten Pairs of Tortoise Shells.

huo yi zhi shi peng zhi gui, fu ke wei, yong zhen ji; wang yong xiang yu di, ji — "someone enriches one with ten pairs of tortoise shells; nothing can oppose it; lasting steadiness brings a favorable outcome; the king presents an offering to the highest, a favorable outcome."

Centered, receptive, and free of self-seeking in the lower trigram, the second line receives the full blessing of the fifth line above. Like Hexagram 41's fifth line, its openness attracts support that no one can block, provided it keeps its quiet steadiness over the long run.

This line asks: can you stay just as grounded and receptive after good things arrive as you were before they came?

3. Line 3 (Third Yin): Enriched Through Difficult Events.

yi zhi yong xiong shi, wu jiu; you fu zhong xing, gao gong yong gui — "enriched through painful events; no blame; if you hold inner truth and walk the middle path, report to the prince with thejade tablet."

Sitting at a restless threshold, this line grows not through easy comfort but through emergency and hard trials. Painful events become a real increase in character when they strip away pretense and teach you to walk the middle path with honest accountability.

This line asks: what recent hardship is actually strengthening your judgment if you face it with honesty?

4. Line 4 (Fourth Yin): Walking the Middle Path and Moving the Capital.

zhong xing gao gong cong, li yong wei yi qian guo — "walking the middle path, one reports to the prince and is followed; it furthers one to be relied upon in moving the capital."

As the line that yielded its own yang strength to enrich the first line below, the fourth place acts as the trusted bridge between leadership above and the foundation below. Even a major structural shift — "moving the capital" — succeeds when it is guided by balanced counsel and aimed at the common welfare.

This line asks: if a major structural move is needed, is it guided by balanced care for the whole rather than private convenience?

5. Line 5 (Fifth Yang): A Sincere and Generous Heart Needs Not Ask.

you fu hui xin, wu wen yuan ji; you fu hui wo de — "with a sincere and generous heart, do not even ask — the most favorable outcome; with inner truth, others respond in kindness to your virtue."

In the ruler's seat of Increase, generosity is not a transaction calculated for return; it flows from genuine goodwill toward those below. The classical text says wu wen — "do not even ask" — because when the motive to benefit others is unfeigned, reciprocity and trust follow as a matter of course.

This line asks: where can you give support whole-heartedly without stopping to calculate what you will get back?

6. Line 6 (Top Yang): Enriching No One, Until Some Strike Against You.

mo yi zhi, huo ji zhi, li xin wu heng, xiong — "no one enriches them; indeed, someone strikes them; keeping an inconstant heart brings a setback."

At the very top of Increase, the principle of the figure is inverted: instead of pouring strength downward to help others, this line hoards advantage for itself and wavers in its commitments. Once people see that a person takes without ever giving back, support vanishes and active opposition takes its place.

This line asks: where has an unwillingness to share or keep steady faith begun to turn allies against you?

This figure carries no additional all-moving statement. When all six lines move, read the transformed figure.


Hexagram 42 FAQ

Q Why does Hexagram 42 define 'Increase' (Yi) as taking from above to give to below?

A: In the trigram structure of Hexagram 42, the bottom line of the upper trigram yielded its yang strength to the bottom line of the lower trigram. Classical commentary reads this as the core law of sustainable growth: when those in strong positions strengthen the foundation below them, the whole house thrives.

Q Why does Line 5 say 'do not even ask — the most favorable outcome' (wu wen yuan ji)?

A: Line 5 reads you fu hui xin, wu wen yuan ji. When generosity at the center comes from genuine care rather than bargaining, there is no need to anxiously question whether the outcome will be favorable; sincerity itself secures the bond.

Q How does Hexagram 42 (Yi) relate to Hexagram 41 (Sun)?

A: Hexagram 41 (Decrease) and Hexagram 42 (Increase) form a single cycle of breathing in and breathing out. Sun pares away excess and ego to build a solid inner core, while Yi channels accumulated strength outward into generous action, mended faults, and shared undertakings.


Did one or more lines move when you cast Hexagram 42 Yi?

In classical six-line analysis, reading all six line statements at once mixes opposite stages of the cycle. Isolate only the changing lines that scored 6 or 9 in your session using Zhu Xi's changing-line rules or 50-stalk yarrow probabilities:

Related Hexagrams & 6-Bit Transitions (Hexagram 42 Yi)

In the Book of Changes (Zhouyi) binary topology, this hexagram is connected to its Opposite (Bitwise NOT), Inverse (180° Rotation), and Nuclear (Inner Core Lines 2–5) archetypes:

How to read this hexagram in context →