The twelve nidanas are the specific application of dependent origination: a chain of conditions showing how suffering comes to be, and how it comes to an end. They are depicted on the rim of the wheel of life, and they are among the first things a student of Buddhist doctrine is asked to learn.

This article takes them one at a time. The traditional image for each is given, because the images are standard across Asia and are often the fastest way into what a link means.

1. Ignorance (avijja) #

Image: a blind person with a stick.

Not lack of information, but a specific misapprehension: not seeing the Four Noble Truths, not seeing things as impermanent, unsatisfactory, and not-self.

Ignorance is placed first, and the texts are careful to say that this does not make it a first cause. When asked what conditions ignorance, the answer given is the taints (asavas) — which are themselves conditioned by ignorance. The chain is a circle, not a line with a beginning. Samsara is beginningless.

2. Formations (sankhara) #

Image: a potter at a wheel.

The constructing activity: volitional formations, karmic dispositions, the shaping of experience. This is where karma is generated, and the potter is apt — something is being made, deliberately, out of material.

On the three-lifetime reading, links 1 and 2 belong to the previous life and are the karmic cause of this one.

3. Consciousness (vinnana) #

Image: a monkey swinging through a tree, or leaping from window to window.

Awareness arising at a sense door. On the rebirth reading this is the rebirth-linking consciousness that begins a new life; on the momentary reading it is any moment of cognition arising conditioned by what preceded it.

The monkey is a canonical simile in its own right: the mind that arises as one thing and ceases as another, by day and by night, grasping one branch and letting go to grasp another.

4. Name-and-form (nama-rupa) #

Image: people in a boat.

The psychophysical organism — mind and body together. Nama covers feeling, perception, volition, contact, and attention; rupa covers materiality.

The boat image carries the key point: consciousness and name-and-form depend on each other mutually. The Mahanidana Sutta says explicitly that consciousness conditions name-and-form and name-and-form conditions consciousness, like two sheaves of reeds leaning together — remove either and the other falls. The chain is not a simple line even at this stage.

5. The six sense-bases (salayatana) #

Image: a house with six windows, sometimes with a monkey looking out.

Eye, ear, nose, tongue, body, and mind, with their corresponding objects. The organism develops the capacity to receive experience through six channels.

The sixth is the distinctive one: mind is a sense-base like the others, taking thoughts and mental objects as the eye takes forms. Buddhism does not treat thinking as a separate order of thing that oversees the senses.

6. Contact (phassa) #

Image: a couple embracing, or kissing.

The meeting of sense faculty, object, and consciousness. Contact is not passive reception; it is the coming-together of three factors, none of which is sufficient alone.

7. Feeling (vedana) #

Image: a person with an arrow in the eye.

The affective tone of the contact: pleasant, unpleasant, or neutral. Nothing more. Emotions are elsewhere; this is bare hedonic quality.

The arrow in the eye is deliberately shocking, and it makes two points. Feeling is not subtle — it lands. And it is not optional: you cannot decline to find an experience unpleasant.

This link is the hinge of the whole chain, for reasons that become clear at the next one.

8. Craving (tanha) #

Image: a person drinking, or being offered drink.

The reaching for pleasant feeling, pushing away of unpleasant, and dullness towards neutral. Tanha literally means thirst.

The texts distinguish three kinds: craving for sensual pleasure, craving for becoming (for existence, for being something), and craving for non-becoming (for annihilation, for not being).

This is where the chain can be broken. Feeling arises whether or not one wants it; craving is the habitual reaction, and it is not necessary. The entire practice of mindfulness of feeling — the second foundation of mindfulness — is training in registering the tone without the reflex.

The Sallatha Sutta’s simile is the standard statement: an untrained person struck by an arrow is struck by a second arrow, the reaction to the first. The first arrow is feeling; the second is craving. The trained person feels one arrow only.

Craving is also the second noble truth, which is why dependent origination and the Four Noble Truths are two versions of one analysis.

9. Clinging (upadana) #

Image: someone picking fruit from a tree, reaching for it.

Craving intensified into holding on. The tradition lists four kinds: clinging to sense pleasures; to views; to rules and observances (including the assumption that practices work mechanically, regardless of understanding); and to a doctrine of self.

The last is the deepest. Clinging to self-view is what converts a process into a person with something to lose.

10. Becoming (bhava) #

Image: a pregnant woman, or a couple.

The process of coming to be — both the karmic activity that produces a future existence (kamma-bhava) and the mode of existence that results (upapatti-bhava).

On the momentary reading, this is the formation of a self-identity around what is being clung to: becoming someone who has been insulted, becoming the person who owns this.

11. Birth (jati) #

Image: a woman giving birth.

The arising of a new existence, on the rebirth reading. On the momentary reading, the full emergence of a self-sense in relation to the situation — the moment at which there is definitely a me here with a stake in this.

12. Ageing and death (jara-marana) #

Image: a corpse being carried, wrapped, to the cremation ground.

And with it, in the canonical formula, sorrow, lamentation, pain, grief, and despair. Whatever is born ages and dies; whatever self-sense arises is threatened and eventually collapses. This is dukkha in full.

And ageing-and-death conditions the taints, which condition ignorance, and the wheel turns again.

The reverse sequence #

The chain is always taught in both directions, and the reverse is the important one.

With the remainderless fading and cessation of ignorance, formations cease; with the cessation of formations, consciousness ceases; and so on, down to: with the cessation of birth, ageing and death, sorrow, lamentation, pain, grief, and despair cease. “Such is the cessation of this whole mass of suffering.”

This reverse sequence is the third noble truth, and it is why the chain is a liberation teaching rather than a pessimistic description.

Where to intervene #

Three points are traditionally identified, of very different accessibility.

Between feeling and craving (7→8). The practical one. Feeling is not preventable; craving is a habit. Mindfulness trains the capacity to experience the tone without the automatic reaction, and every insight tradition works this junction.

At clinging (9). Investigating the four kinds of clinging, particularly self-view, which is what insight into non-self addresses.

At ignorance (1). The root, and the least directly accessible. It is undone by wisdom, which is the fruit of the other two rather than a separate operation.

Note what is not on the list: contact, the sense-bases, and feeling itself. A practitioner who tries to prevent experience from arising has misunderstood the analysis. The point is not to stop feeling but to stop the second arrow.

The disagreement about timescale #

Whether the chain spans three lifetimes or a single moment is set out in Dependent Origination. Briefly: the Theravada commentarial standard distributes it across past, present, and future lives; the momentary reading takes it as describing the arising of any instance of suffering now; and several modern teachers hold that it applies at any scale.

For practice purposes the momentary reading is what most meditators work with, because it is the one that can be observed. For doctrinal purposes the three-life reading is what links dependent origination to rebirth and to the six realms.

Common questions #

Why does the list have twelve links? Other versions exist in the canon with nine, ten, and other numbers — the Mahanidana Sutta gives a nine-link version starting at consciousness. Twelve became standard, but the variation suggests the number is not doctrinally load-bearing.

Is ignorance the first cause? No. It is first in the list, and the texts explicitly deny a first point. Ignorance is itself conditioned, and the circularity is intended.

Can I really observe this? Parts of it, readily: that a tone precedes reaction, that the reaction is fast and habitual, that a self-sense hardens around what is grasped. The links spanning birth and death are not observable in the same way and are held on the tradition’s authority.

Which link is most important? The tradition’s practical answer is the feeling–craving junction, because it is where the chain is actually breakable. Doctrinally, ignorance is the root.

Sources & further reading #

Bhikkhu Bodhi (trans.), The Connected Discourses of the Buddha (Wisdom, 2000), SN 12 — the primary collection. Bhikkhu Bodhi, The Great Discourse on Causation (BPS, 2nd ed. 1995) — the Mahanidana Sutta (DN 15) with the commentary. Bhikkhu Analayo, Satipaṭṭhāna: The Direct Path to Realization (Windhorse, 2003), chs. 8–10 — on the feeling–craving junction in practice. Rupert Gethin, The Foundations of Buddhism (Oxford, 1998), ch. 6. Buddhaghosa, The Path of Purification, trans. Bhikkhu Nanamoli (BPS, 4th ed. 2010), ch. 17 — the classical three-lifetime exposition.