Among the most important insights in the Buddha’s teaching are the three marks of existence (tilakkhaṇa): impermanence (anicca), unsatisfactoriness or suffering (dukkha) and not-self (anattā). The Buddha taught that every conditioned thing — every object, body, feeling, thought and situation — shares these three characteristics. They are not gloomy beliefs to accept on faith, but patterns anyone can observe in their own experience.
In a short discourse in the Aṅguttara Nikāya, the Buddha says that whether or not a Buddha appears in the world, this remains a fixed law of nature: all conditioned things are impermanent, all conditioned things are suffering, all things are not-self. A Buddha does not invent these truths; he discovers them, and then explains them so that others can see them too.
Sabbe saṅkhārā aniccāti, yadā paññāya passati;
When one sees with wisdom that all conditioned things are impermanent, one becomes weary of suffering. This is the path to purification. — Dhammapada 277
atha nibbindati dukkhe, esa maggo visuddhiyā.
Anicca — impermanence
Everything that arises also passes away. Seasons change, bodies age, moods shift from hour to hour, and even mountains slowly wear down. Most of the time we know this intellectually, yet we live as though the things we love will stay exactly as they are. Impermanence is easiest to see in small things: a sound appears and fades, a breath comes in and goes out, a feeling of irritation rises and then dissolves.
Seeing impermanence clearly is not meant to make us sad. It helps us value what we have while we have it, and it softens our grip when things change. A difficult period, too, is impermanent — it will not last forever.
Dukkha — unsatisfactoriness
The word dukkha covers far more than physical pain. It includes the stress of losing what we like, of meeting what we dislike, and the subtle dissatisfaction that comes from depending on things that cannot last. A beautiful meal ends; praise fades; even a happy holiday carries the knowledge that it will be over soon. Because conditioned things change, they cannot give lasting satisfaction.
The suttas speak of three kinds of dukkha: the plain suffering of pain itself; the suffering that comes when pleasant things change and end; and the deeper unsatisfactoriness of all conditioned existence, which is always unstable and dependent on causes. The third kind is the hardest to see, and seeing it is a work of insight.
The Buddha did not say that life contains no happiness. He spoke of many kinds of happiness, from the joy of a good family life to the deep peace of meditation. Dukkha means that no conditioned happiness can be a final refuge. Understanding this is the first of the Four Noble Truths.
Anattā — not-self
The third mark is the most subtle. When we look closely at body, feelings, perceptions, mental formations and consciousness — the five aggregates — we cannot find an unchanging owner or controller behind them. If the body were truly “me” or “mine”, we could tell it not to age or fall sick. Since we cannot, the Buddha said it is not fitting to regard it as “this is mine, this I am, this is my self”.
Not-self does not mean that a person does not exist in the everyday sense, or that we are not responsible for our actions. It means that what we call “I” is a changing process, not a fixed thing. This understanding loosens selfishness, pride and fear, and opens the heart to others.
How the three marks connect
In the Anattalakkhaṇa Sutta (SN 22.59), his second discourse, the Buddha links the three marks in a simple chain of questions: Is it permanent or impermanent? Impermanent. Is what is impermanent satisfying or unsatisfying? Unsatisfying. Is it fitting to regard what is impermanent and unsatisfying as “mine, I, my self”? No. Each mark leads naturally to the next. The five ascetics who heard this teaching were all fully liberated by the end of it.
Notice a small detail in the Dhammapada (verses 277–279). The first two verses say all conditioned things are impermanent and suffering, while the third says all things (dhammā) are not-self. Theravāda commentators take this wider word to include even Nibbāna, which is not impermanent or suffering, yet is still not a self.
Common misunderstandings
- “Buddhism says life is suffering.” More precisely, it says conditioned things cannot give lasting satisfaction — and that there is a way to complete peace.
- “Buddhism says there is no self.” When the wanderer Vacchagotta asked directly whether there is a self or not, the Buddha stayed silent (SN 44.10), because either answer would mislead. Not-self is a tool for letting go, not a theory to argue about.
- “Knowing the theory is enough.” The marks liberate only when seen directly, again and again, in one’s own body and mind. That direct seeing is what insight meditation (vipassanā) trains.
In practice
- In meditation: during mindfulness of breathing, notice how each breath, sound or sensation arises and passes.
- In daily life: when something you like changes, quietly note “impermanent”.
- In difficult moments: remember that this feeling, too, will pass.
- In relationships: let impermanence encourage kindness now, rather than “someday”.
- For deeper study: the Satipaṭṭhāna Sutta repeatedly asks the meditator to observe things “arising and passing away”.
Reflection: choose one object you use every day. Over a week, notice the small ways it — and your feelings about it — change. Then ask: which of my worries today assume that something will stay the same?
