27. The Corners of the Mouth
頤 · Yí
Mountain over Thunder
Trigrams
Nuclear Trigrams (互卦)
Nuclear trigrams are formed from the inner lines of the hexagram (lines 2-3-4 and 3-4-5) and reveal the hidden tendencies of the situation.
Judgment
The corners of the mouth. Perseverance brings good fortune. Pay heed to the providing of nourishment and what a person seeks to fill his own mouth with. Attend carefully to what you take in and what you give out.
Image
At the foot of the mountain, thunder — the image of providing nourishment. The superior person is careful of his words and temperate in eating and drinking.
Interpretation
Hexagram 27, The Corners of the Mouth (頤 Yí), is the I Ching's meditation on nourishment in all its dimensions — physical, intellectual, emotional, and spiritual. The image of the corners of the mouth captures both directions of nourishment: what goes in (what we take in to feed ourselves) and what comes out (what we put into the world through speech, action, and example). This bidirectionality is the hexagram's essential teaching: right nourishment is both receptive (taking in what genuinely nourishes) and generative (putting out what genuinely nourishes others).
The physical image is precise: a mouth that is properly nourished — that takes in appropriate food and speaks with appropriate care — functions correctly. A mouth that takes in what is not nourishing, or speaks carelessly, is in a state of disharmony that radiates outward. The I Ching is not moralistic about this; it is practical. What we take in becomes what we are; what we put out shapes the world around us.
The counsel to "pay heed to what a person seeks to fill his own mouth with" is at once literal and metaphorical: the diet of food, information, experience, relationship, and influence that we choose to take in shapes our character and our wellbeing as certainly as our physical nourishment. This hexagram asks: are you genuinely nourishing yourself and those around you?
Philosophy & Trigram Dynamics
The Corners of the Mouth is formed by Mountain (☶ Gèn) above Thunder (☳ Zhèn) — stillness above initiative, Mountain above Thunder. This creates the image of the mouth itself: the jaw (Mountain — still, the lower jaw or the structure of the face) above Thunder (the movement of speech and eating). The hexagram's hexagram symbol, when viewed as a picture, actually resembles an open mouth: two solid yang lines at the top and bottom, four yin lines (empty, open) in between.
The nuclear hexagram is Hexagram 2 (The Receptive / 坤 Kūn), which suggests that the deepest dimension of nourishment is receptivity — the ability to truly receive what is given, whether physical food or spiritual sustenance, rather than consuming without genuinely assimilating.
The Confucian commentary's specific counsel — "careful of his words and temperate in eating and drinking" — reflects the ancient Chinese understanding of the relationship between physical self-discipline and moral cultivation. The person who cannot regulate their physical intake cannot regulate their speech; the person who cannot regulate their speech cannot cultivate genuine virtue. Self-regulation in small things is the foundation of self-regulation in large things.
Practical Guidance
❤ In Love & Relationships
The nourishment dimension of Hexagram 27 in relationships is profound: what are you genuinely taking in from your most important relationship, and what are you genuinely putting out? Is the relationship nourishing you, or depleting you? Are you genuinely nourishing your partner, or are you taking more than you give?
The speech dimension is particularly relevant in intimate relationships: the quality of the words we speak to those closest to us — the gentleness or harshness of everyday communication, the care or carelessness of how we give feedback, the generosity or withholding of genuine appreciation — shapes the relationship's character as certainly as any grand gesture.
◆ In Career & Business
In professional contexts, Nourishment applies to the intellectual diet of your work: what you are learning, the quality of information you are taking in, the intellectual community you are nourished by. The hexagram counsels genuine attention to these sources of professional nourishment: are the books, mentors, colleagues, and ideas you are absorbing genuinely excellent? Are they expanding your capacity rather than merely confirming your existing assumptions?
The speech dimension applies here too: how you communicate in your professional relationships — the care you take with your words, the honesty and clarity of your communication — nourishes or depletes the professional community around you.
✦ Health & Energy
Hexagram 27 is directly relevant to physical health: what you eat, how you eat, the quality of what you take in. The counsel is one of genuine attentiveness — not dietary ideology but honest, curious attention to what actually nourishes your particular body. The classical advice to be "temperate in eating and drinking" is not a prohibition but a principle: appropriate quantity and quality, taken with genuine attention, nourishes; excess or negligence depletes.
The Sage's Counsel
The counsel of The Corners of the Mouth is to examine both directions of your nourishment honestly: What are you taking in? And what are you putting out? For each of your most important domains — physical health, intellectual life, key relationships, professional community — assess the quality of what you are nourishing yourself with and the quality of what you are offering to others.
One specific practice: for one week, notice the quality of your speech in your most important relationships. Are you giving words that genuinely nourish, or words that deplete? The practice of genuinely nourishing speech is one of the most powerful transformative practices available.
Historical Context
Hexagram 27 is one of eight hexagrams whose visual symbol is referenced in the classical text — in this case, explicitly as representing an open mouth. This visual quality reflects the I Ching's characteristic Chinese concreteness: abstract principles are grounded in embodied, practical reality. Nourishment is not merely a metaphor; it begins with the literal act of taking in food, and the wisdom of attending to that literal act extends naturally to all other forms of nourishment.
The classical Chinese medical system (Traditional Chinese Medicine) treats diet as foundational to health — not in the reductive sense of modern nutritionism but in the full sense of what genuinely nourishes the whole person at every level. Hexagram 27 embodies this understanding.
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Frequently Asked Questions
What does I Ching hexagram 27 The Corners of the Mouth mean?
Hexagram 27 (頤 Yí) addresses nourishment in all dimensions — what we take in (food, information, experience, relationship) and what we put out (speech, action, example). It counsels genuine attention to both directions: are we genuinely nourishing ourselves and genuinely nourishing those around us?
What does hexagram 27 say about diet and physical health?
Hexagram 27 is one of the I Ching's most directly relevant hexagrams for physical health: it counsels genuine, honest attention to what you eat and drink, with the classical advice of temperance — appropriate quality and quantity, taken with genuine care rather than compulsion or negligence.
What does hexagram 27 mean in relationships?
In love, The Corners of the Mouth addresses the nourishment exchange of relationship: what you are receiving from your most important relationships, what you are offering, and the quality of your speech in those relationships. Genuinely nourishing speech — caring, honest, generous — is one of the most powerful relationship practices.
What is the Mountain over Thunder image in hexagram 27?
Mountain (stillness, the structure of the face/jaw) above Thunder (movement, the action of speech and eating) creates the visual image of the mouth itself. When the hexagram symbol is viewed visually, it resembles an open mouth: solid lines at top and bottom, open space in between. This visual quality makes Hexagram 27 one of the most concretely embodied in the I Ching.
How does the nourishment of speech connect to physical nourishment in hexagram 27?
The I Ching treats the mouth's two functions — eating and speaking — as reflecting the same underlying principle: what we take in and what we put out both shape us and the world around us. The discipline that produces temperate, thoughtful eating is the same discipline that produces careful, genuinely nourishing speech. Self-regulation in one domain supports self-regulation in the other.
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