Sadhana Pada 2.51 — The Fourth — Breath That Transcends In and Out

The fourth transcends the spheres of the external and the internal.

Unpacking the Sanskrit

This sūtra is built from a single dense compound and one short word. The compound is bāhya-ābhyantara-viṣaya-ākṣepī, and the word it qualifies is caturthaḥ — the fourth. Caturtha simply means "fourth" (from the numeral catur, four), and it points back to the three movements of breath named in the previous sūtra: the outward (bāhya), the inward (ābhyantara), and the held or suspended (stambha-vṛtti). The fourth is set apart from and above these.

Within the compound, bāhya derives from a root sense of "outer, external" and names the sphere of the out-breath; ābhyantara, from abhi-antara ("toward the inner"), names the sphere of the in-breath. Viṣaya means a sphere, domain, or field of operation — here the territory marked out by those two movements. The decisive term is ākṣepī, an agent-noun from the verbal root kṣip, "to throw, cast," with the prefix ā: literally "that which throws beyond, casts aside, oversteps." The fourth prāṇāyāma is thus the one that casts aside, transcends, or oversteps the very fields of outer and inner that the three regulated movements occupy.

What the sutra asserts

Patañjali points beyond the three measured movements to a further reach of the practice. Where the previous sūtra described deliberate regulation across the phases of out-breath, in-breath, and hold — each located by place, counted by number, and timed in duration — this fourth state lies past all such deliberate management. It is not a fourth technique to be added to a list of three, but a different order of event altogether: a suspension of breath that is no longer manufactured by the will.

The classical tradition reads the fourth in two complementary ways, and the sūtra's wording sustains both. In one reading, it is a suspension of breath that arises spontaneously, no longer produced by counting or effort but occurring of itself as absorption deepens — a stillness of breath that comes rather than one that is made. In the other reading, it transcends the in-and-out distinction because it has passed beyond the framework of phases and measures entirely: a breath so refined that the categories of external and internal no longer apply to it. The two readings meet in a single recognition — that here regulation has given way to something regulation cannot reach.

Effortful and effortless

The crucial difference between this fourth and the regulated breath of the preceding sūtra is the difference between contrived and arisen. The earlier practice is deliberately managed: the breath is located in its place, timed in its duration, and counted in its number, all by the action of the will. The fourth is what those disciplines lead toward but cannot themselves produce — a natural cessation of the breath's movement that appears when the mind has grown deeply still. It is the fruit, not the technique.

This is why the sūtra is careful not to describe a method. There is no instruction to be followed here, no count to be held, no place to be observed, because the fourth is precisely the state that begins where instruction ends. The practitioner does everything the third prāṇāyāma asks, refining the breath to the very edge of what effort can accomplish, and then the further stillness arrives — or does not — of its own accord. One prepares the ground; one does not grow the flower by pulling on it.

The danger of mistaking the two is real, and the sūtra's silence about technique is itself a teaching. A practitioner who tries to force the fourth — to make the breath stop in the way one makes it pause — produces only another deliberate hold, a stronger version of the third movement rather than the thing beyond it. The very straining that would manufacture the fourth is what keeps it away, for the fourth belongs to a mind that has let go of straining. To recognize this is to understand that some attainments recede in exact proportion to the force used to seize them.

A breath beyond measure

It is worth marking how radically the fourth differs from everything that precedes it in the treatment of breath. The three movements of the previous sūtra are defined by their measurability: each can be located in a region of the body, counted in repetitions, and timed in its duration, and the whole discipline of the third prāṇāyāma consists in observing these measures and refining them. The fourth carries no such marks. It cannot be counted, for it is not a repetition; it cannot be timed by the will, for the will has stepped aside; it cannot be located among the phases, for it has passed beyond the very framework of phases.

This is what the term ākṣepī, casting beyond, finally means: the fourth oversteps not merely the out-breath and the in-breath but the entire apparatus of measure that governs them. Where the regulated breath is an object the practitioner works upon, the fourth is a condition the practitioner enters — or, more exactly, is entered by. The shift is from doing to undergoing, from a breath that is shaped to a breath that simply quiets because the one who would shape it has grown still. In this sense the fourth is less a kind of breathing than the threshold where breathing, as a deliberate act, dissolves.

The place in the pada's argument

Within the unfolding of the Sādhana Pāda this sūtra completes the treatment of breath and prepares the turn inward. The previous sūtra defined regulated breathing in its three measurable movements; this one names the state beyond them; and the sūtras that follow will describe the fruits — the wearing-away of the veil over the inner light, and the mind's resulting fitness for concentration. The fourth prāṇāyāma stands at the threshold, the point at which breath-work passes from something the practitioner does to something that happens within the practitioner.

The pairing it embodies — a disciplined practice followed by an effortless state that lies beyond it — echoes the deepest logic of the whole text. As surrender to the supreme (īśvara-praṇidhāna) crowns the observances, and as the relaxation of effort and the merging in the infinite complete the teaching on posture, so here a breath beyond all regulation completes the regulation of breath. The will refines its instrument to the utmost, and then something arrives that effort alone could never produce.

Read in this light, the fourth prāṇāyāma is not an appendix to the teaching on breath but its quiet climax. The whole movement of the Sādhana Pāda has been from the gross toward the subtle, from outward observances toward inner refinement, and the breath-sūtras carry that movement into the body's most intimate rhythm. Having brought the breath under measure, the text now points past measure altogether — and in doing so prepares the reader for the still more interior fruits about to be named. The fourth is the hinge on which the treatment of breath turns from technique toward transformation.

The commentary tradition

The classical commentators take up the fourth with evident care, for its very transcendence makes it hard to define. Vyāsa, in the foundational Yoga-Bhāṣya, draws the sharp line between the three regulated movements, which are governed by observation of place, time, and number, and the fourth, which is the cessation of breath that follows once both spheres have been thoroughly mastered — a suspension reached through, and yet beyond, the disciplined practice that precedes it. On his reading the fourth is the consummation toward which the measured breathing tends.

Vācaspati Miśra, glossing Vyāsa in the Tattva-vaiśāradī, sharpens the distinction by stressing that the fourth does not merely lengthen a hold but supersedes the very orientation of inner and outer, so that the categories used to describe the first three no longer apply to it. Vijñānabhikṣu, in his Yoga-vārttika, presses the point that the fourth is marked by its effortlessness and its independence from the deliberate counting that defines the others — it is breath stilled by the depth of absorption rather than by the action of the will. Bhoja, in his concise Rāja-mārtaṇḍa, reads the term ākṣepī in its strong sense of "casting beyond," so that the fourth is that which throws the practice past the reach of both external and internal fields. Across these views, however they differ in emphasis, the consensus is clear: the fourth is not one more measured breath but the natural stilling that crowns and exceeds all measuring.

A stillness observed across lineages

The recognition of a spontaneous suspension of breath in deep absorption is a notable point of cross-tradition agreement among those who have observed the body in profound stillness. Contemplatives across the lineages have described how, as the mind grows very quiet, the breath of its own accord becomes faint, slow, and at times nearly imperceptible — a stilling that no one performs. The fourth prāṇāyāma names exactly this arising rather than achieved cessation, and the testimony for it is remarkably consistent wherever deep meditative quiet has been cultivated.

From doing to non-doing

The structural shape — a deliberate practice that gives way to an effortless state beyond it — is among the most universal in contemplative life. The Daoist Tao Te Ching describes precisely this passage from doing to wu wei, from the effortful regulation of the vital breath to a natural, uncontrived flow that the practitioner no longer manufactures. The Daoist breath that "comes and goes of itself" in deep stillness is a close cousin of Patañjali's fourth: the result of a discipline so complete that the discipline disappears into spontaneity.

The breath that quiets of itself

The Buddhist accounts of the deepening meditative absorptions describe a similar refinement, in which the gross breath grows progressively subtler until, in the depths of samādhi, it nearly ceases — not by force but by the natural settling of the whole system. Across these traditions the testimony converges: at the floor of deep stillness the breath quiets of its own accord, and what disciplined technique approached from outside arrives, finally, as a gift from within. The fourth prāṇāyāma is the Yogic name for a threshold that many roads reach.

There is a profound principle here that reaches well beyond the breath: that disciplined effort prepares for, but cannot itself produce, the deepest states — which arrive of their own accord when the conditions are right. We practice and refine and measure, doing all that the will can do, and then the further reach comes not as another achievement but as something that happens when we have grown still enough to receive it.

This describes the structure of every depth that cannot be forced. The regulated breath is the work we do; the breath that stills itself is what follows when the work has done all it can. To understand the difference is to know both when to apply effort and when to stop applying it — to refine the instrument to its utmost and then to wait, quietly, for what only stillness can bring. The fourth is always reached by way of the third, yet is never made by it; and learning to honor that distinction is among the quietest forms of wisdom a person can hold.

1. A limit on trying harder

In a culture that believes any goal can be reached by trying harder, the fourth prāṇāyāma names a category of experience that resists this assumption entirely: states that can be prepared for but never manufactured. The harder one tries to force such stillness, the more surely it recedes, because the forcing is itself the obstacle.

2. Allowing rather than willing

The breath that stills of its own accord cannot be willed; it can only be allowed. The practical wisdom is to do the disciplined work fully — the measured, regulated breathing of the prior sūtra — and then to release the very intention to control, letting whatever arises arise.

3. The same movement everywhere

This is the same movement that governs falling asleep, entering a state of flow, or finding genuine ease: prepare diligently, then stop trying. Among the most useful things the sūtra teaches a striving modern mind is precisely this — that there is a kind of arrival reached only by ceasing, at last, to reach.