The Eight Limbs of Ashtanga Yoga

Sage Patanjali names all eight limbs in a single sutra, 2.29 of the Yoga Sutras: yama, niyama, asana, pranayama, pratyahara, dharana, dhyana, and samadhi. Together they compose Ashtanga Yoga, a comprehensive, progressive system for purifying the body, mastering the mind, and reaching liberation, kaivalya.

The first limb, yama, governs how a practitioner treats the world beyond themselves through five restraints: ahimsa (non-violence), satya (truthfulness), asteya (non-stealing), brahmacharya (the preservation of one's sacred energy), and aparigraha (non-possessiveness). These five restraints come first in the sequence because a mind still entangled in harm, deceit, or grasping toward others has no stable ground from which to turn its attention inward.

The second limb, niyama, turns this same discipline inward through five observances. These are saucha (cleanliness of body and mind), santosha (contentment), tapas (disciplined austerity), svadhyaya (self-study and the reading of sacred texts), and Ishvara Pranidhana (surrender to the Divine). Where yama restrains a practitioner's conduct toward others, niyama cultivates the inner qualities that conduct alone cannot produce.

Patanjali defines the third limb, asana, in sutra 2.46 with a single phrase, sthira sukham asanam, a posture that is steady and comfortable. The entire elaborate tradition of physical postures familiar in modern practice descends from this one short definition, which asks only for a stable, comfortable seat from which the remaining limbs can be undertaken without the body itself becoming a source of distraction.

The fourth limb, pranayama, expands and regulates the subtle life-force energy carried on the breath. Having stabilized the body through asana, the practitioner now stabilizes the breath, recognizing that an erratic breath reliably accompanies an erratic mind and that mastering one offers a direct route toward mastering the other.

The fifth limb, pratyahara, draws the five senses inward, away from the external objects they habitually chase. This limb marks the hinge of the entire eightfold sequence, the point where the practice turns from preparing the body and breath to working directly on the mind's own habitual outward orientation.

The sixth limb, dharana, binds attention to a single focal point or mantra without wavering. The seventh, dhyana, deepens this single-pointed concentration into an unbroken, continuous flow of awareness toward the Divine. The eighth and final limb, samadhi, completes the sequence as a state of pure absorption, a complete union with consciousness in which the illusion of individual separateness dissolves entirely into bliss.

Each limb depends on the stability the limb before it has already secured. This is why Patanjali presents them in a fixed sequence rather than as eight independent practices a seeker might take up in any order. A practitioner who attempts pratyahara, withdrawing the senses, while still entangled in the ethical violations yama forbids will find the senses have nothing stable to withdraw from. The agitation yama addresses keeps recreating the very external entanglement pratyahara is meant to release. Samadhi, the final limb, is not a separate technique layered on top of the first seven but their natural culmination, arriving only once body, breath, senses, and attention have each been stabilized in their proper turn.

The first five limbs, yama through pratyahara, are often called the external limbs because each still involves the body, the senses, or a practitioner's conduct in the visible world. The final three, dharana, dhyana, and samadhi, are called internal because they unfold entirely within consciousness itself, with nothing left for an outside observer to see. Ashtanga Yoga's architecture insists that this inward turn cannot be rushed or substituted for the external discipline that precedes it. The external limbs exist specifically to make the internal ones possible, clearing away everything that would otherwise distract attention before attention is asked to turn fully inward.

Sutra 2.29 names all eight limbs in a single breath, and sutra 2.46 defines an entire physical discipline in four syllables, sthira sukham asanam. This extreme compression is itself part of the Yoga Sutras' method: rather than elaborating each limb at length within the root text, Patanjali offers a terse skeleton that later teachers and practitioners have spent centuries filling in through commentary and lived practice. The brevity leaves room for each limb to be explored as deeply as a given tradition or teacher requires, while still anchoring every elaboration to the same eight-word sequence named once, precisely, in sutra 2.29.