What is Hexagram 58, Dui, and where does it sit among the 64 hexagrams?
Hexagram 58, Dui (純兌), also called Dui Wei Ze (兌為澤) or simply Dui, is the 58th of the 64 hexagrams of the I Ching, coming right after Hexagram 57, Xun (Thuần Tốn). It is made of two Dui trigrams (☱) stacked: the inner trigram below is Dui, and the outer trigram above is also Dui. Dui images a lake, and also joy and harmonious delight. In the five phases (ngũ hành), Dui belongs to Metal, corresponding to the West in the Later Heaven Bagua.
Its line structure: six lines, four yang and two yin. The two yin lines sit at the top of each trigram, that is lines 3 and 6. This is the point to remember when reading the line texts, because all six line texts of the hexagram turn on the position and character of those two yin lines in relation to the four yang lines.
| Attribute | Value |
|---|---|
| Ordinal number | 58 / 64 |
| Sino-Vietnamese name | Thuần Đoài (純兌) |
| Other names | Đoài Vi Trạch (兌為澤), Đoài |
| Image | ☱ over ☱ (lake over lake) |
| Inner trigram (lower) | Dui ☱, lake, joy |
| Outer trigram (upper) | Dui ☱, lake, joy |
| Five phases | Metal |
| Number of yang lines | 4 / 6 |
| Opposite hexagram (zong gua) | Thuần Cấn (Hexagram 52) |
Why does Hexagram 58, Dui, come after Hexagram 57, Xun?
According to the Xu Gua Zhuan (Tự Quái truyện), a later commentary on the order of the hexagrams, Dui follows Xun because only after entering can one be joyful, so after Xun comes Dui, and Dui means joy. Xun is the hexagram of entering, of soaking in, of following along and entering the heart. Dui is the hexagram of joy, of harmonious delight, of open exchange. The reasoning of the Xu Gua Zhuan is causal: one must first enter people's hearts, must first soak into the situation, before there can be joy in the true sense. Joy that comes before mutual understanding, before mutual soaking in, is usually only surface joy.
Two layers of text must be kept distinct here. The gua ci, yao ci and xiang ci are taken as the words of the classic. The Tuan Zhuan, Xiang Zhuan, Xu Gua Zhuan and Xi Ci are later commentaries, not merged into the classic. The explanation of why Xun comes before Dui is the view of the Xu Gua Zhuan, not the words of the classic text.
The gua ci and xiang ci of Hexagram 58, Dui
The gua ci (Tuan ci) of the hexagram, given in the Chinese text and the Sino-Vietnamese reading in circulation:
兌:亨,利貞
Đoài: Hanh, lợi trinh.
Meaning: success, and it is favorable to hold firm. Four very short characters, yet they pack the whole spirit of the hexagram. Dui is a lake, and also joy, harmonious delight. Joy opens the heart, and through it all things succeed. But the classic immediately adds the word zhen, holding firm. Joy must be genuine, must be able to stand, not showy, not feigned to win favor. Only joy held in that truthful way endures.
The xiang ci:
麗澤,兌;君子以朋友講習
Lệ trạch, Đoài; quân tử dĩ bằng hữu giảng tập.
Meaning: two lakes adjoining is the image of Dui. The noble person follows this and discusses and learns together with friends. Two lakes side by side let water flow between them, each filling the other. Studying alone easily runs dry; studying with friends digs deep. This is one of the finest teachings on the friendship of learning in the I Ching. The great joy of life is not only the joy of eating and playing, but also the joy of discussing with someone who understands you.
The six line texts and plain-language readings
The six lines of Dui sketch six different degrees of joy, from warm, natural joy to joy gone crooked through calculation or through being lured. Reading the whole hexagram helps a person examine which kind of joy they are in.
Sơ cửu (line 1): 和兌,吉 (Hòa đoài, cát). Joy in harmony, good. This is simple, clear joy without calculation. Like a child's joy at an outing, friends meeting again after a long time, a couple eating a quiet meal. No great reason needed, no one's praise needed. The line says briefly: good. Another reading holds that line 1 is yang at the bottom, like a noble person who is humble, has no private attachment above, and so uses only the right way to be harmonious and joyful with all. This fits the ordinary reading: joy in harmony without seeking anything.
Cửu nhị (line 2): 孚兌,吉,悔亡 (Phu đoài, cát, hối vong). Joy in sincerity, good, regret disappears. This is joy one step deeper than line 1. A person in this role is joyful because they trust what they do and trust those they walk with. The joy has a root, not a passing flare. The line says: good, the heart is at ease. Ease here means nothing left to regret, nothing left to worry over. Some books explain line 2 as yang and firm, attaining the center, with the virtue of honesty, untouched by the bad habits of line 3 beside it, so no regret. This is where books differ on detail, but all point the same way: joy with trust endures.
Lục tam (line 3): 來兌,凶 (Lai đoài, hung). Coming to seek joy, bad. This is the person who actively hunts joy. Not joy that comes naturally, but joy that must be chased. A person in this line is often empty inside, so must plunge into parties, into drinking bouts, into new relationships to fill up. The line says plainly: bad. The more you seek, the more you lack; the more you run, the more tired you get. Some books explain line 3 as yin and soft, neither central nor correct, seeking joy without keeping to the way, unable to seek joy from the two yang lines above, and unable to succeed seeking it from the two yang lines below, so the result is bad. Note: this is a judgment within the social norms of an earlier era, so read it as a description of a situation, not a moral rule imposed on every time.
Cửu tứ (line 4): 商兌未寧,介疾有喜 (Thương đoài vị ninh, giới tật hữu hỉ). Deliberating over joy, not yet at peace; keeping oneself apart from what is harmful brings gladness. A person in this role is torn between two roads: joy that is true or joy that is easy. The heart is not at peace, still pulled inside. The line gives a clear direction: keep yourself apart from what is harmful, and there is good news. In ordinary life, this is the moment to cut off relationships that drag you down, leave the group that drinks too much, drop heavy entertainment habits. Some books explain line 4 as yang and firm in a yin position, hesitant at first, then by its yang firmness deciding to follow line 5 and abandon the crooked for the right. The word shang here means weighing and considering, not trading.
Cửu ngũ (line 5): 孚于剝,有厲 (Phu vu bác, hữu lệ). Trusting what strips you away, there is danger. This is a heavy warning line. A person in a high role, with power or prestige, places trust in someone secretly undermining them. Like an employer trusting someone with ambition, a talented person trusting someone using them to advance. The line says: there is danger. The lesson: the higher the role, the more careful one must be with sweet words. Some books explain line 5 as yang and firm, central and correct, in a noble seat, but in the time of Dui, close to the yin and soft line 6, so harm is certain. This is a warning about high position and the great temptations that come with it.
Thượng lục (line 6): 引兌 (Dẫn đoài). Luring others into joy. The last line of the hexagram does not close with fulfilled joy but with a warning: a person uses joy, promises, honeyed words to draw others after them. This is the most crooked joy of the six lines. One who does this may gain in the short term, but loses trust later. Some books explain line 6 as yin and soft at the top of Dui, close to what is bad and easily falling through ordinary desire, so clarity and firmness are needed to avoid harm. The line does not judge directly good or bad, but implies: joy that goes out from you and becomes a tool to lure others has left the original spirit of Dui.
How do harmonious joy, trusting joy, lured joy, and led-away joy differ?
This is the core distinction of the whole hexagram. The four yang lines (1, 2, 4, 5) and the two yin lines (3, 6) form two groups different in nature.
The yang lines are the group of joy with inner strength. Line 1 is joyful in harmony because there is nothing to seek inside. Line 2 is joyful because it trusts what it does. Line 4 weighs and then chooses the right. Line 5, though in a high seat, warns about trusting the wrong person. Common point: joy goes from inside out, has a root, has self-mastery.
The yin lines are the group of joy that comes from outside in. Line 3 seeks joy to fill an inner emptiness, and the result is bad because the more it seeks the more it lacks. Line 6 uses joy to lure others, turning joy into a tool, and the result is lost trust later. Common point: joy without a root, dependent on others or on drawing others in.
The difference between harmonious joy and people-pleasing joy lies here: harmonious joy is a natural state, needing no praise, no recognition. People-pleasing joy is a state that must be performed, maintained, calculated, so it does not last. The gua ci already says it clearly: success, but it is favorable to hold firm, that is, success but one must hold firm. Joy that cannot hold firm is not the joy of Dui.
Is Hexagram 58, Dui, auspicious or inauspicious?
This is where sources differ, and it should be presented fully.
The common traditional reading: Hexagram 58, Dui, is basically auspicious, because the gua ci says success and favorable to hold firm, and the xiang ci speaks of learning with friends, a very beautiful image. Genuine joy opens the heart, and through it all things succeed. This reading stays close to the classic words.
Another reading: some sources place Dui among the inauspicious hexagrams, arguing that the hexagram points to a time of dispersal, unsettled hearts, work that does not advance easily, and difficult finances. Note that this argument comes with assigning the hexagram another name and another image, not fully matching the name Dui Wei Ze. When reading such sources, compare again with the original gua ci and yao ci to judge for yourself.
One more point to distinguish: the verse slips in the book Khổng Minh Thần Toán include hexagrams named Bát Thuần Đoài, for example slips 52 and 54 in that book's system. These are slip texts of a separate system, NOT the Zhou Yi line texts, and should not be mixed in when discussing Hexagram 58 of the I Ching. Same name, two different systems, different casting, different interpretation.
Applying Hexagram 58, Dui, in life
In love, casting Dui is usually read as a phase of harmony and joy, easy openness to others. A single person has a chance to meet a suitable partner through gatherings with friends, social events, or introductions by acquaintances. A person in love is in a smooth phase, talking easily, sharing easily. Line 2 is worth remembering: only sincere joy endures. The warning from line 3: do not seek romantic joy only to fill an inner emptiness. Also be wary with line 5: someone may come with sweet words but not a true heart.
In work and business, this hexagram is usually read as favorable conditions, good relations with people, easy to be liked and valued. But some sources note caution in eating, parties, and relations between men and women, because joy easily slides into people-pleasing. Some sources also advise guarding against sudden difficulty in the middle of a smooth period, not to be careless. In study, the hexagram is read as results close to what was planned, not outstanding. In health, some sources mention care with the risk of injury through carelessness, but this is a general reminder, not an absolute claim.
It should be said clearly: the field-by-field applications above are reference readings, not claims about the finances, health or fate of any specific person. The I Ching is a system of signs and interpretation, and its value lies in helping the reader examine their situation and attitude, not in certain prediction.
The main lesson of Hexagram 58, Dui
The original spirit of the hexagram is packed in four words: success, favorable to hold firm. Joy brings success, but only held firm is it favorable. Holding firm here means joy must go with truthful words and trust, not with sweet words and indulgence.
The xiang ci gives a concrete image to follow: two lakes adjoining let water flow, each filling the other. The noble person follows this and discusses and practices together with friends. This is the deepest reading of joy: joy at learning with someone who understands you, at discussing, at growing together. That joy does not depend on parties, needs no one's praise, and needs no one's favor.
The six line texts are a scale. Whoever is at line 1 or line 2 is in the zone of joy with a root. Whoever is at line 3 should stop and ask what they are hiding from. Whoever is at line 4 is at a fork, and must choose decisively. Whoever is at line 5 should re-examine whom they trust. Whoever is at line 6 should ask whether they are turning joy into a tool to draw others in.
How are Hexagram 58, Dui, and Hexagram 57, Xun, related?
According to the Xu Gua Zhuan, Hexagram 57, Xun, stands right before Dui, and the reasoning is that only after entering can one be joyful. Xun is entering, soaking in. Dui is joy, harmonious delight. Placed side by side, the two hexagrams form a pair: to be joyful in the true sense, one must first understand each other, must first soak into each other. Joy that comes before mutual understanding is usually only surface joy, easily dissolved.
The opposite hexagram of Dui is Thuần Cấn (Hexagram 52). Dui is a lake, is joy, is opening out. Cấn is a mountain, is stopping, is closing in. They oppose in image and in direction of movement. This is a contrast relation within the 64-hexagram system, not a causal one.
How should Hexagram 58, Dui, be read correctly?
Hexagram 58, Dui, does not teach cheering on every kind of joy. It teaches distinguishing kinds of joy. Joy in harmony is good. Joy with trust is good and ends regret. Joy hunted down is bad. Joy weighed and then rightly chosen brings gladness. Joy from trusting the wrong person brings danger. Joy from luring others has left the root.
Points to keep when interpreting: do not assert absolute fortune or misfortune for any specific situation. The same hexagram, depending on the moving line, the question asked, the times, is read differently. The line texts describe situations and point to courses of action, not fixed verdicts. And as said above, where line texts carry the social norms of an earlier era, for example the judgments of line 3 or line 6, read them as historical context to understand the text, not as rules imposed on life today.
Structure of Hexagram 58, Dui, in one table
| Item | Value |
|---|---|
| Ordinal number in the Zhou Yi | 58 |
| Chinese character name | 兌 |
| Upper trigram | Dui (Lake) |
| Lower trigram | Dui (Lake) |
| Six lines, top to bottom | yin, yang, yang, yin, yang, yang |
| Nuclear hexagram | Phong Hỏa Gia Nhân (Hexagram 37) |
| Opposite hexagram | Thuần Cấn (Hexagram 52) |
| Reversed hexagram | Thuần Tốn (Hexagram 57) |
Where do the six lines of Hexagram 58, Dui, sit, and which hexagram does each moving line produce?
The table reads from the first line (bottom) up to the top line. Line names combine position and nature: yang is called Cửu, yin is called Lục. The last column is the changed hexagram when ONLY that line moves, calculated by the same method used by the Nhật Nguyệt casting tool.
| Line | Name | Nature | Correct position | Central | Correspondence | Changes to |
|---|---|---|---|---|---|---|
| 1 | Sơ Cửu | yang | yes | no | with line 4, no response | Trạch Thủy Khốn (Hexagram 47) |
| 2 | Cửu Nhị | yang | no | yes | with line 5, no response | Trạch Lôi Tùy (Hexagram 17) |
| 3 | Lục Tam | yin | no | no | with line 6, no response | Trạch Thiên Quải (Hexagram 43) |
| 4 | Cửu Tứ | yang | no | no | with line 1, no response | Thủy Trạch Tiết (Hexagram 60) |
| 5 | Cửu Ngũ | yang | yes | yes | with line 2, no response | Lôi Trạch Quy Muội (Hexagram 54) |
| 6 | Thượng Lục | yin | yes | no | with line 3, no response | Thiên Trạch Lý (Hexagram 10) |