The three truths are the three true things Korea's Samil Singo says every person receives before anything is earned: seong (성, 性), myeong (명, 命), and jeong (정, 精). In Korean they are the samjin (삼진, 三眞) — your true nature, your true life, and your true essence. And unlike everything else in the world, a human being receives all three whole.
The strangest thing about them is how they are defined. The scripture does not describe the three truths by what they contain. It describes each one by a division it does not have. True nature has no good and evil in it. True life has no clear and murky. True essence has no abundance and lack. Every one of them sits before the measuring — and measuring is more or less what we do all day.
This article takes the three one at a time: what each truth is, what grew over it, and what the scripture says can be done about it. If you have already read about the Samil Singo as a whole, this is the close-up of its most quoted three words.
What are the three truths (samjin)?
The Truth Chapter — the Jinrihun (진리훈, 眞理訓), the fifth and longest chapter of the Samil Singo — opens by handing you something.
人物同受三眞 曰性命精 人全之 物偏之 "People and all things alike receive three true things. They are called seong, myeong, and jeong. People receive them whole; other things receive them partially."
The original lines quoted throughout this article come from that chapter; the renderings are Zexeda's commentary on the text.
Notice the word true (진, 眞). It is not the same as good. Something can be good and still be a reaction, a habit, a story about yourself. These three are called true because they are what is actually there underneath the reactions — what remains when nothing has been added.
Notice too that they arrive as a gift, not a target. The chapter has not yet described a problem, a practice, or a path. Before any of that, it tells you what you already have. Everything that follows in the chapter is an account of what covered it.
Here are the three, as the scripture defines them:
| Truth | What it is | What it is free of | Who can meet it | Verb |
|---|---|---|---|---|
| Seong (성, 性) | true nature | good and evil (무선악) | those awakened most deeply | open through it (통, 通) |
| Myeong (명, 命) | true life | clear and murky (무청탁) | those awakened to a middling degree | know it (지, 知) |
| Jeong (정, 精) | true essence | abundance and lack (무후박) | those awakened to some degree | preserve it (보, 保) |
Keep that last column in view. Three different verbs are used for three different truths, and they are not interchangeable. You do not preserve your nature or open through your essence. Each truth has its own way of being met — and much later, those same three verbs come back as the fruit of practice.
What is seong (성, 性), the true nature?
眞性 無善惡 上哲 通 "True nature has no good or evil in it; those awakened most deeply can open through it."
Seong is your original nature — not your personality, not your temperament, not the character other people would describe if asked. It is what is there before any of that formed.
And the scripture's definition is the part worth sitting with: true nature is free of good and evil. Not mostly good. Not good underneath it all. Free of the pair — prior to the entire operation of sorting things into two piles.
That sounds abstract until you notice how constantly you do the sorting. A thought arrives and within a second it has been filed: that was a petty thing to think. A stranger's face is read and filed. Your own morning is graded before lunch. The sorting is so continuous that it feels like perception itself rather than something laid over perception.
The scripture says exactly where that habit comes from, and it does not call it an intruder:
心 依性 有善惡 善福惡禍 "The mind rests on nature; it comes to hold good and evil, so that good brings blessing and evil brings calamity."
The mind (심, 心) is the first of the three delusions (삼망, 三妄), and look at how it is described: it rests on nature. It is not an enemy that invaded from outside. It is your own true nature, clouded — a truth that had no halves, split into halves, followed by a lifetime of choosing between them.
This is why the verb for seong is open through (통, 通). Nothing has to be built. Something has to become passable again, the way a road that was there all along becomes a road again when what fell across it is moved. The word for that opening — seongtong (성통, 性通) — is the first half of the destination this whole tradition names.
What is myeong (명, 命), the true life?
眞命 無淸濁 中哲 知 "True life has no clear or murky in it; those awakened to a middling degree can know it."
Myeong is usually translated as life or as the mission given to you, and both are a little narrow. What the character carries here is closer to the life given to you — the fact that you are alive at all, and that the aliveness comes with knowing in it. Not knowledge, which is collected. Knowing, which is simply on.
It is free of clear and murky — the pair that describes conditions, not the thing itself. A day can be clear or muddled. Your attention can be sharp or blurred. Neither of those is your life; they are the weather that your life is currently having.
The delusion that grows here is energy (기, 氣):
氣 依命 有淸濁 淸壽濁夭 "The energy rests on life; it comes to hold clear and murky, so that clear brings long life and murky an early death."
That last phrase is written in the plain language of its time, and it is worth reading as description rather than as a rule about health. The chapter is not promising anyone a long life or warning anyone about a short one, and nothing in this tradition should be taken as medical guidance. What it is naming, in the simplest words available, is how a life feels when it is run by a divided measure — one where every day has to be scored clear or murky before it is allowed to count.
The verb for myeong is know (지, 知), which becomes myeongji (명지, 命知) — coming to know your own life, with no ignorance left in it. Not analysed, not explained. Known — the way a person finally knows, for themselves, why they are here and how, without having to work it out.
What is jeong (정, 精), the true essence?
眞精 無厚薄 下哲 保 "True essence has no abundance or lack in it; those awakened to some degree can preserve it."
Jeong is the most concrete of the three: your true essence, the substance a life is actually made of. It is the truth closest to the body, and the easiest of the three to feel.
It is free of abundance and lack — no too much, no too little, no running low. Which is a strange claim, because running low is the most familiar sensation most of us have. Not enough sleep, not enough time, not enough money, not enough of whatever the neighbours appear to have. And here the scripture's third pairing lands:
身 依精 有厚薄 厚貴薄賤 "The body rests on essence; it comes to hold abundance and lack, so that abundance is called noble and lack is called lowly."
The body (신, 身) is the third delusion — and notice that the split it makes does not stop at counting. It goes on to attach worth to the count: more is noble, less is lowly. The whole apparatus of status, in six characters, described several thousand words before anyone invented a word for it.
The verb for jeong is preserve (보, 保), which becomes jeongbo (정보, 精保) — the essence preserved. Preserving is a humble verb. It suggests not squandering, not scattering, not spending yourself in eighteen directions at once. And it is the truth the scripture places nearest: an essence can be preserved by someone awakened to some degree, while a nature can be opened through only at the deepest end.
In what order is the way back walked?
A list is not a schedule, and the three truths are easy to mistake for one. There are actually three different orders at work here, and keeping them apart is what makes the teaching usable.
| Order | What it describes | Direction |
|---|---|---|
| The order the truths are named | seong → myeong → jeong | subtle to concrete |
| The depth at which each lies (上哲 · 中哲 · 下哲) | jeong nearest · myeong next · seong deepest | near to far |
| The order the clearing is done | mind → body → energy | most governing first |
The first two orders come straight from the scripture. The third belongs to the practice tradition this site follows, and it is the one that tends to surprise people — because it does not begin at the easy end.
The work begins with the mind. Of the three delusions, the mind is the one that governs. It decides what everything means before you have finished noticing it, and while it is still doing that, nothing underneath it can settle. So the first practice is jigam — stopping reactive feeling — even though the truth lying beneath the mind, your true nature, is the one the scripture places deepest of all. The hardest layer is the first one worked, not the last. This is also why progress here is rarely dramatic at the start: the first stretch of the road is the steepest part of it.
Then the body. Once the mind's grip has loosened even partway, the body's pulls can actually be met instead of merely resisted. That is geumchok — guarding contact — the plain physical layer of what you look at, listen to, eat, and walk into. Attempted first, it tends to become a set of rules you break. Attempted second, it becomes something much closer to common sense.
And the energy last. Not because it is minor. The energy layer carries the subtlest thing in the whole account: a picture of "I", assembled out of the mind and the body, that a person takes for their own life — for their myeong itself. It can only be seen for what it is once the two things it is made of have thinned out. That is josik, evening the breath, and it comes last for that reason rather than as an afterthought.
One caution, because the sequence is easy to misread. These are not three phases you graduate from and leave behind. After the first pass through them, they stop being a sequence at all and are carried together, as the single intention the scripture names (일의화행) — and it is that sustained turning, not the first pass, that the chapter calls the false, turned back, becoming true (반망즉진).
So this tradition does not start where it is easiest. It starts where it is most decisive. The truth that lies deepest is the one whose covering is lifted first — and that is why the road asks for patience early, when there is least to show for it.
What grew over the three, and what does the way back look like?
The Truth Chapter's account of the covering is short and almost gentle. Ordinary people lose sight of the root, and the three delusions take hold: mind over nature, energy over life, body over essence. Those three then open three roads — feeling, breath, and contact — which branch into eighteen states that a life can be spent chasing. That whole movement, road by road and state by state, is laid out in the article on the Samil Singo.
What matters for the three truths themselves is what the scripture says next:
返眞一神 "Returning to the true is becoming the one God."
Returning. Not building, not earning, not being granted. The word choice is the whole doctrine. If the three truths had to be acquired, the ones who lacked them would be out of luck. Because they were given whole, no one is missing anything — which is the quiet reason this tradition can be demanding about practice without being harsh about people.
And when the chapter reaches its end, it hands back the same three verbs it opened with. The nature opens through (성통), you come to know your own life (명지), the essence is preserved (정보). The three truths return as the fruit of the road, described in exactly the words used for the gift. What you get at the end is what you had at the start, uncovered.
How that is actually done — one memory, one breath, one contact at a time — is the subject of the three seals of Dangun: the sword that clears what covers the three truths, the mirror that keeps them clear once recovered, and the bell that lets the clarity sound outward as Hongik Ingan, the benefit of all. This article is the map of what is being recovered. That one is the map of the recovering.
What do the three truths mean for me today?
You do not need to accept a metaphysics to use any of this. The three truths are, before anything else, three unusually precise questions to ask about an ordinary day.
1. Start from what was given, not from what is missing. Most self-examination begins with a deficit: what is wrong with me, what am I short of, what do I still need to fix. The Truth Chapter begins from the other end — three whole things, already yours, currently covered. Try holding a difficulty in that frame for one day. The question stops being what am I lacking and becomes what is in the way. Those two questions send you in genuinely different directions.
2. Catch the moment a pair appears. Each delusion works by splitting a truth in two. So the seam is visible, and it is visible in real time. When you notice yourself grading something good or bad, that is the mind at work on nature. Clear or murky — sharp day, foggy day, productive or wasted — is the energy at work on life. Enough or not enough, and its ugly little companion worth more or worth less, is the body at work on essence. You do not have to do anything about it. Noticing which of the three pairs just ran is enough to loosen its grip a little.
3. Do not rearrange your life first. When something is wrong, the instinct is to change the surroundings — the schedule, the feed, the room, the diet. Useful, and it is not where this tradition starts. It starts one layer in, at the delusion that was already doing the sorting before any of those things arrived, because that is the layer the other two answer to. Expect this to be the hard part, and expect to fail at it often. The practice is not succeeding at it — it is noticing the delusion, letting it go, and returning to what was there before it. What changes is that the outward adjustments, made second instead of first, finally hold.
And one closing observation about the number. The scripture that names three truths is called the Samil Singo — the teaching of the three and the one. The three truths are not three separate possessions to be collected in sequence. They are one wholeness, met in three ways, by a person who has to start somewhere. Which is why the destination is stated in the singular: not returning to the truths, but returning to the true. The Cheonbugyeong says the same thing about everything that exists — that the one divides into three without ever leaving the one. The Samil Singo simply says it about you.
Continue with Zexeda
If the idea of three whole things underneath the clutter is worth sitting with, the reading continues in the Zexeda newsletter — a quiet weekly letter that takes Korea's ancient wisdom one line, and one small practice, at a time. You are welcome to walk along.
Key takeaways
- The three truths (삼진, 三眞) are seong (성, true nature), myeong (명, true life), and jeong (정, true essence) — named in the Truth Chapter of the Samil Singo.
- Each is defined by a division it does not contain: nature is free of good and evil, life of clear and murky, essence of abundance and lack. All three sit before measurement.
- They are given, not earned. People receive all three whole; other things receive them partially (人全之 物偏之). This is a statement about completeness, not rank.
- The three delusions grow over them in a fixed pairing stated by the scripture itself: mind rests on nature, energy rests on life, body rests on essence. Each works by splitting its truth into a pair and then choosing between the halves.
- Each truth has its own verb — you open through the nature, come to know your own life, and preserve the essence — and those same three words return at the end of the road as seongtong, myeongji, jeongbo.
- Three orders should be kept apart: the truths are named subtle to concrete; the scripture places jeong nearest and seong deepest; and the clearing work goes mind → body → energy — jigam first, then geumchok, then josik. The hardest layer is worked first, because the mind governs the other two.
- Because the truths were given, the way home is a return, not an acquisition: returning to the true is becoming the one God (返眞一神).
- What the recovering actually looks like — clearing, keeping, and sharing — is laid out in the three seals of Dangun.
This article is for educational and reflective purposes and shares interpretations of Korea's ancient wisdom traditions. It is not medical, psychological, or professional advice.