64 Hexagrams / 32
Heng · Duration
Duration is a rhythm you can keep, not an effort you strain.
Judgment and Plain-Language Notes
Heng: Success, no blame. Steadfast correctness is beneficial; proceeding is beneficial.
The Tuan commentary glosses Heng as lasting: thunder and wind work together, firm and yielding all respond. Enduring in the way is the way of heaven and earth, which goes on without end, and every ending has a beginning. Sun and moon can shine long because they hold to heaven. The Xiang image is thunder and wind, with the noble person standing firm and not changing direction.
Xun below, Zhen above: thunder and wind reinforce each other, an image of what lasts. Lasting here does not mean staying the same. The commentary points to the sun, the moon and the four seasons: it is because their change has order that they can shine and complete for so long. The judgement affirms the direction of persistence, and the lines mark two ways of losing balance. The first digs too deep at the very start and goes badly. The top one shakes with restlessness and also goes badly. Real duration is a steady rhythm between holding where holding is right and moving where moving is right.
The judgment's success, no blame, beneficial steadfastness, and beneficial proceeding are all positive, and its commentary invokes Heaven and Earth's enduring way. Yet the lines' actual situations are weaker: the first six's excessive pursuit of constancy brings misfortune with no benefit, the third nine brings shame and regret, the fourth gains no game in the hunt, and the top six's restless constancy brings misfortune. Only the second nine's vanished regret is clearly good. A lofty meaning meets many misplaced lines; favorable and adverse balance out, hence the rating: Neutral. This is the app's interpretation of the text, not a guarantee of outcomes.
Worth doing: set a rhythm you can repeat, keep it going over time, and correct the course at regular intervals. Avoid: reversing decisions constantly, chasing novelty, or clinging to a method that no longer fits.
Understand This Hexagram Through Its Structure
Zhen above, Xun below: wind underneath, thunder above — a structure that lasts.
- Name the upper and lower trigram of Heng.
- Explain why this arrangement reads as duration.
- Point out that Duration and Increase use the same two trigrams in the other order.
The lower trigram of Heng is Xun: a broken first line with two solid above. The upper is Zhen: a solid fourth line with two broken above. The second, third and fourth lines are solid, forming a run of three.
Xun is wind, entering by going along; Zhen is thunder, movement. With yielding below and movement above, motion is sustained rather than broken, so the figure reads as duration. Note that heng does not mean unchanging: the moving part is always present, and duration means being able to keep that motion going, not standing still. What lasts is usually a small action that can be repeated, not one that spends everything at once.
A teaching example, not a prediction: a team schedules one fixed hour of clean-up each week and keeps it for two years. Heng describes that sustainable structure; it does not say the results are good.
The Six Lines: Original Text and Reflection
Six at the beginning: Seeking constancy too deeply. Persistence brings misfortune; nothing is beneficial.
Digging deep for duration. The Xiang commentary locates the trouble in seeking depth at the very beginning: demanding too much too soon makes lasting harder.
Wanting to dig a relationship or a project to its deepest point straight away, and to have it permanent from the start, is an excess that goes badly and brings no advantage. Duration accumulates over time and cannot be drawn in full at the outset.
Asking for a long-term commitment shortly after meeting, or expecting complete trust in your first week in a job, usually produces the opposite. Let the depth grow at its own pace.
Have you asked for something deep while the relationship is still shallow?
Nine in the second place: Regret vanishes.
The line text is two words: regret disappears. The Xiang commentary supplies the reason, that this position can hold to the centre over a long period.
Only the disappearance of regret is stated, which makes this the steadiest line in the hexagram. The commentary credits a long-held middle way, neither slanted nor extreme, which dissolves the regret that might have formed.
Keep your daily pace at the middle setting, neither excessive nor slack. Over a long stretch, many of the things you would have regretted simply never happen.
Is your current pace the kind you could hold for three years?
Nine in the third place: Without constancy in virtue, one may incur shame. Persistence brings regret.
Not maintaining one's character. The Xiang commentary says such a person has nowhere to be contained, so disgrace may follow and holding to this brings regret.
Conduct that is good one day and poor the next, with no consistent thread, can bring humiliation and leaves the situation regrettable. The commentary puts it harder still: the inconsistent person ends up with no ground to stand on.
Standards that move with your mood and accounts that do not match up will gradually use up other people's trust. Holding a basic standard steadily beats being excellent now and then.
Which of your standards have you quietly relaxed lately for convenience?
Nine in the fourth place: No game in the hunt.
Hunting in the field and taking no game. The Xiang commentary says the root cause is remaining long in a position that is not yours, so of course nothing is caught.
You go out to hunt and come back with nothing. The commentary blames long residence in the wrong position: persisting from a place that does not fit yields little however long you keep at it. Duration has to be applied in the right place.
If you have put a long time into something with no result, the thing to examine may not be how hard you tried but whether this position, direction or method ever suited you.
Is your persistence being spent in the right position?
Six in the fifth place: Constancy in virtue. Steadfastness brings good fortune for the wife and misfortune for the husband.
The Xiang commentary reads this through the role divisions of its own era: constancy to one course is favourable for one role, while the person whose duty is to judge and decide does badly by simply going along. Read today, this distinguishes the position that should hold from the position that should decide, rather than prescribing anything about gender.
Keeping the established conduct and method going is favourable for someone in a role of maintenance, and unfavourable for someone who must adapt to circumstances and carry the responsibility of judgement. The same persistence gives opposite results in different roles.
If your role is steady execution, consistency is a strength. If your role is deciding, holding to the old method past the point of fit can cost you. Work out which kind of responsibility you carry first.
Does your present position call for holding steady, or for changing at the right moment?
Six at the top: Restless constancy. Misfortune.
Duration turned into agitation, at the top position. The Xiang commentary says that in the end this achieves nothing great, hence the unfavourable reading.
Duration has been made into constant shaking, with someone in a high position moving restlessly. The commentary is direct: sustained agitation looks active and accumulates no result.
Constantly switching direction and overturning yesterday's decision drains the team and drains you. Real stability comes from a predictable rhythm rather than continuous motion.
How much of your recent change was a necessary adjustment, and how much was unease?
Try It Yourself
Swap the halves so Zhen moves down and Xun moves up, and see what the name becomes.
This page has a hands-on exercise. It is built into the Traditional Chinese page: open the interactive exercise.
Quick Quiz
Source: Wikisource, Zhouyi. Classical text in the public domain; digital edition under CC BY-SA 4.0 . revid 2530043 (original text checked against the Wikisource MediaWiki API revisions response on 2026-09-24). Source historical forms wu and yu are retained. The name follows the page title's heng character rather than its alternative. Wikisource conversion markup is removed, keeping enclosed forms unchanged. The fifth six's “good fortune for the wife, misfortune for the husband” follows the source; explanations alone clarify its ancient role context. Accessed 2026-09-24. CC BY-SA 4.0 . This page retains the original app's arrangement of the classical text and plain-language teaching, reformatted for the web.