The Practice

18. The Eight Limbs (Ashtanga)

अष्टाङ्ग aṣṭāṅga = aṣṭa (eight) + aṅga (limb). Patañjali’s practical programme.

A note on the word: “limbs”, not “stages”. The difference is essential and continuously misunderstood. The limbs of a body do not come in order — they exist simultaneously and support each other. You do not finish the yamas and then start āsana.

The five Yamas (2.30)

The five Niyamas (2.32)

Notice the root tapas: “heat, burning”. The same logic as the agni of chapter 7. Discipline is fire — it transforms whatever enters it. Too little, nothing is digested. Too much, you burn.

The last three: Samyama

Limbs 6-7-8 (dhāraṇā, dhyāna, samādhi) are not separate techniques. They are degrees of intensity of the same thing, and together they are called संयम saṃyama:

• Dhāraṇā: you try to hold attention on one point, and it escapes, and you bring it back. Again and again.
• Dhyāna: you no longer have to bring it back. It flows.
• Samādhi: there is no longer anyone attending and something attended.

You do not decide to do dhyāna. You do dhāraṇā; dhyāna happens or does not happen. The third is not “done” by anyone in any way.

19. Āsana: what Patañjali actually says

This chapter is short because the original is short. In 195 verses, āsana gets three. And no posture is described.

The definition (2.46):

स्थिरसुखमासनम् sthira-sukham āsanam
“The posture is steady and comfortable.”

Two words. स्थिर sthira = steady, firm, unshakeable (yang-like). सुख sukha = comfortable, pleasant; literally “good space” (su-kha, from kha = aperture, space — its opposite, duḥkha, “bad space”, is the word for suffering).

Both at once, or it is not āsana. Steady without comfortable = tension. Comfortable without steady = collapse. This is the only criterion the text gives, and it is sufficient.

The method (2.47):

प्रयत्नशैथिल्यानन्तसमापत्तिभ्याम् prayatna-śaithilya-ananta-samāpattibhyām
“By relaxing effort and settling in the infinite.”

प्रयत्न prayatna = effort. शैथिल्य śaithilya = relaxation, loosening.

That is: the path toward the posture is not more effort — it is less. You remove what is unnecessary until only what holds remains. It is exactly the principle of 鬆 song in the Chinese system: not slackness, but the absence of unneeded tightening.

The result (2.48): the pairs of opposites (hot/cold, pleasant/unpleasant) cease to disturb.

And now the historical honesty

The postures people do today:

• Patañjali (~2nd–4th c.) describes none. Āsana there means practically a seat for meditation.
• The Haṭhayogapradīpikā (15th c.) describes 15. The Gheraṇḍa Saṃhitā (17th c.) describes 32. Most are seated or supine.
• The dozens of standing postures and flows — Surya Namaskar in its current form, the warriors, the sequences — appear in Mysore in the 1930s, in the school of Krishnamacharya (teacher of Iyengar, Pattabhi Jois, Desikachar). With documented influences from British military gymnastics, Scandinavian physical culture and Indian wrestling.

This is not an accusation. Modern āsana is an excellent system of physical education. It is simply:

Yoga inspired by the tradition, not ancient yoga. And anyone who tells you that the posture you are doing is 5,000 years old is saying something that is not true.

The irony is that the criterion remains the ancient one and holds absolutely: sthira-sukham. It applies to Sirsasana and to sitting in a chair.

20. Ten practical principles for the body

The Chinese text has the “Ten Essentials” of Yang Chengfu — a tight list from a single school. The Indian tradition has no corresponding canonical list. What follows is a synthesis: each principle is marked [classical] if it comes from the texts, or [modern] if it is a 20th-century teaching convention. I do not pretend this is an ancient catalogue.

1. स्थिरसुख — Steady and comfortable [classical, YS 2.46]

The only criterion. In every posture, ask both: “am I holding?” and “can I breathe freely here?” If the second answer is no, the posture is wrong — no matter how it looks.

2. The breath defines the limit [modern, with a classical basis]

The most practical test there is: the limit of a posture is not where it hurts. It is where the breath changes. If the breath has become choppy, shallow or held, you have already passed the limit — even if you can tolerate it comfortably. This connects directly to ch. 5: breath is the window into the autonomic. When it is distorted, the system has gone into defence, and in defence it learns nothing.

3. प्रयत्नशैथिल्य — Relaxation of effort [classical, YS 2.47]

In every posture, find what you are doing unnecessarily: clenched jaw, raised shoulders, held fingers, furrowed brow. Let it go. The posture usually improves when you subtract, not when you add.

4. The axis first [classical]

मेरुदण्ड merudaṇḍa, “the axis of mount Meru” — the spine as the central pillar of the world. Lengthening the axis always precedes flexion, rotation or extension. Length first, then shape. If the rotation happens at the cost of length, you are twisting a compressed column.

5. Root before flower [modern]

What touches the ground is organised first. Soles, sitting bones, palms. The strength of a shape comes from contact, not from the far end. (The direct Chinese correspondence: 其根在腳 — “the root in the soles”.)

6. Apāna down, prāṇa up, meet at the centre [classical]

The body is not one piece going in one direction. It is two opposing currents: weight and grounding downward, length and lightness upward. Both at once. “Pull up” without “sit down” produces a hovering, unstable body.

7. Fine tone, not clenching [classical, with a modern correction]

The mūla bandha and the deep core work in low, continuous tone — not maximum contraction. Maximum contraction does not stabilise; it immobilises. (Same principle as the 力 li / 勁 jìn distinction: raw local force versus organised whole-body force.)

8. Symmetry does not mean sameness [modern]

The two sides are not the same and are not going to become so. The goal is not to equalise the shapes — it is to work equitably on both sides. Pursuing visual symmetry produces injuries on the more mobile side.

9. अहिंसा — Non-harming toward this body [classical, YS 2.30]

The first yama has no exception for the self. Ambition inside a posture is the most common form of violence in practice, and the most easily justified. The test: if someone you loved were watching you, would you recommend they do what you are doing now?

10. The posture ends after the posture [modern, with a classical basis]

The information is in the moment just after: in the first breath after you come out. That is where it shows whether the system quieted or was aroused. A practice that leaves you more nervous than it found you, whatever it did in between, did not go well. (And this is why शवासन śavāsana, corpse pose, is not an interval at the end. It is where what happened gets digested — what does not get digested becomes āma, ch. 7.)

The essential about the essentials

They are not ten. They are one, seen from ten angles:

A posture is not a shape you impose. It is an organisation you permit.

If you break #1, you have already broken the other nine.

21. Pranayama: the mechanics of breath

प्राणायाम prāṇāyāma. Here there is a beautiful ambiguous etymology where both readings are correct and complementary:

• prāṇa + आयाम āyāma (“extension, lengthening”) → extension of prāṇa
• prāṇa + यम yama (“restraint, control”) → control of prāṇa

You extend by lengthening. You control by restraining. It is the same thing from two sides.

The four phases

The cycle has four parts, not two. And the tradition cares particularly about the two most people ignore:

कुम्भक kumbhaka (from kumbha, “pot”). The Haṭhayogapradīpikā explicitly considers retention as the essence of pranayama; inhalation and exhalation are merely the way to get there.

The two fundamental techniques

नाडीशोधन Nāḍī Śodhana — “channel-cleansing” (alternate-nostril breathing). The most basic. Aim: equilibrate ida/pingala, hence open the sushumna (ch. 10). In practice: breath through one nostril at a time, alternating. No retention for the beginner. It is, as far as I know, the technique with the lowest probability of going wrong and the most robust documentation in autonomic-tone studies.

उज्जायी Ujjāyī — “the victorious”. A slight constriction of the glottis so that the breath becomes audible, like a low sound of sea. Mouth closed. Why it is clever: the sound turns the breath into an acoustic feedback signal. You hear immediately if it has been cut, if it has become uneven, if it has been held. It is, essentially, portable biofeedback without a machine — and that explains why it survived as the main breath in modern practice.

(There are many others: kapālabhāti, bhastrikā, śītalī, bhrāmarī. The first two are intense hyperventilations and have real contraindications.)

The warning, without hedging

The classical sequence is āsana before pranayama, and pranayama before kumbhaka. The Haṭhayogapradīpikā says explicitly that wrong pranayama practice causes illness instead of health, and recommends caution like the lion tamer with the wild animal.

And it is right for measurable reasons: intensive hyperventilation causes hypocapnia — drop in CO₂ — leading to cerebral vasoconstriction, paraesthesia, tetany, syncope. Prolonged retentions alter intrathoracic pressure and venous return.

Practical rules not to be violated:

• Never pranayama on a full stomach
• Never intensive techniques in pregnancy, hypertension, cardiac disease, glaucoma, epilepsy
• Never to the point of dizziness; dizziness is not a sign of progress
• If anxiety or panic sensation appears, stop — breath work can trigger panic in vulnerable individuals, and this is documented

22. Drishti and Pratyahara: the economy of attention

प्रत्याहार Pratyāhāra — withdrawal

The fifth limb, and the most misunderstood. Literally: prati (“against, back”) + āhāra (“food, intake”) → “reversed food”.

It does not mean to close the senses. It means: the senses stop pulling — whatever comes in no longer sweeps you.

The classical image: the tortoise withdrawing its limbs. It does not cut them off; it draws them in.

Why it is the key to the whole system: it is the bridge. Limbs 1–4 are external and you can “do” them. Limbs 6–8 are internal and you cannot “do” them. Pratyāhāra is the only crossing, and this is where most practice gets stuck.

And it is the most contemporary concept of the whole text. The term āhāra means “food” and the tradition uses it equally for what comes in through the eyes and ears. A system that describes impressions as food that must be digested, and over-consumption as production of āma, is describing something that in 2026 needs no explanation.

दृष्टि Dṛṣṭi — the point of gaze

[As a systematised catalogue, modern — from the school of Pattabhi Jois. The principle itself is classical; Patañjali speaks of concentration on a point, and the tantric texts have trāṭaka, steady gazing.]

In every posture, the gaze has a destination: tip of the nose, between the brows, navel, hand, toe, side, up.

Why it works, without metaphysics: three measurable things.

1. The gaze determines the position of the neck, and the neck determines the tone of the whole chain — tonic neck reflexes, documented.
2. A steady visual point immediately improves balance (reduces centre-of-pressure sway; this is why one-foot stands are so much harder with eyes closed).
3. The most important: vision is the most demanding input channel. A steady gaze point drastically reduces visual noise — that is, it is pratyāhāra through the back door, without you having to “withdraw” anything by will.

And this is the essential: dṛṣṭi is the proof that the system prefers structural solutions to volitional ones. It does not tell you “don’t get distracted”. It gives you a point, and the problem disappears.