The Sixty-Four Hexagrams: How the I Ching Answers

A line is either whole or broken. Stack six of them, bottom to top, and you have a hexagram. There are exactly sixty-four ways to do it, and that set of sixty-four is the entire vocabulary of the oldest divinatory system still in continuous use. Everything else in the I Ching, the whole accumulated commentary of three thousand years, is an attempt to say what each of those arrangements is like.

Two kinds of line

Start with the smallest unit. A solid line is yang: active, asserting, giving. A broken line is yin: receptive, yielding, holding. Neither is better, and neither is stable, which is the first thing the system wants you to understand. Its name is usually translated as the Book of Changes, and the changes are the point: yang at its extreme turns into yin, yin at its extreme turns into yang, and nothing that is currently the case intends to stay that way. The pair itself is treated at length in yin and yang.

Trigrams, then hexagrams

Stack three lines and you get one of eight figures, the trigrams, each carrying a family of associations: heaven, earth, thunder, water, mountain, wind, fire, lake. Eight of them, because two options to the power of three is eight. They are the alphabet of the system, and they are covered in the eight trigrams and the body.

A hexagram is two trigrams stacked, a lower and an upper, which is why there are sixty-four: eight times eight. And the reading of any hexagram usually begins there. What is underneath, in the position of the inner situation and the foundation, and what is above, in the position of the outer situation and what is visible? Fire over water is a different world from water over fire, and the images the text gives for each grow directly out of that relation.

Casting

The most common method uses three coins, thrown six times. Assign three to one face and two to the other, add the three coins, and you get a number from six to nine for that line. Six and nine are the extremes and produce changing lines; seven and eight are the ordinary ones. The first throw makes the bottom line, and you build upward, which matters: the reading grows from the ground, and the bottom line is the beginning of the situation while the top is its outcome or its overreach.

The older method uses a bundle of fifty yarrow stalks, divided and counted through a longer procedure that yields the same range of numbers but with different probabilities, and takes far longer. Traditionalists prefer it for exactly that reason. The slowness is a feature. Whichever method you use, the essential thing is that you are not choosing. The answer arrives through a process your preferences do not touch, which is the whole reason to consult anything outside yourself.

Changing lines, and the second hexagram

Here is the part that makes this oracle different from most. Any line that came up as a six or a nine is at its extreme, and extremes turn into their opposite. So each changing line has its own short text to read, and then you flip every changing line to its opposite and read the resulting second hexagram.

What you end up with is not a verdict but a movement: this is the situation, these are the places in it that are already turning, and this is what it is becoming. A reading with no changing lines is a settled state, and a reading with five is a situation in freefall. That structure is the system's actual teaching, and it is why the I Ching is so hard to use for fortune-telling and so useful for orientation. It answers the question of where you are standing and which way the ground is tilting.

What it asks of you

Two practical disciplines make the difference between a real consultation and a party trick. The first is asking a proper question. “Will I get it” gets you nowhere, because the book does not deal in outcomes it can be scored on. “What is my part in this” or “what am I not seeing about this situation” gives the answer somewhere to land.

The second is sitting with an answer you do not like instead of recasting. The impulse to throw again until the coins agree with you is universal and it destroys the practice completely. If the answer is opaque, write it down and come back in a week. Half of the value of this oracle is the discipline of holding a strange image against a real situation until one of them gives.

The book's counsel, again and again, is to move with the shape of the moment rather than against it, to wait when waiting is what the situation is made of and to act when it has turned. That is the ethic of wu wei, and it is a bodily skill as much as a philosophical one: knowing the difference between resting and stalling is something you feel before you can argue it. The related sense of what the moment is made of runs through the still point.

A short practice

Take three coins and one honest question about a situation you are actually inside of. Sit still for a minute first, hands quiet, exhale long. Throw six times, building the lines from the bottom up, noting any sixes and nines. Look up the hexagram, read it, then read your changing lines and the second hexagram they produce. Write one sentence about what the movement from the first to the second would mean if it were true. Then put it away and do nothing about it for a day.

The I Ching at Glyph Praxis casts the hexagrams, tracks the changing lines, and shows the second hexagram beside the first with the full text for both. It is free with a Glyph Praxis account, no subscription needed. Open the I Ching and ask one thing properly.