Eight limbs, one body, and a mind that Ayurveda never forgot

The word yoga comes from the root yuj — to join, to yoke, to bring together. Whatever is scattered is gathered; whatever is divided is made whole. That is the entire claim of yoga, held inside a single root.

So it is worth pausing over what we have done to the word. Hot yoga. Power yoga. Ever-newer versions arriving each season, each promising the same thing — flexibility, faster, in a body pushed harder. It is fair to ask the plain question: are these advancing yoga, or quietly replacing it? And if a practice built around difficult postures and a warmed room is what most people now mean by yoga, are we practising the thing at all, or only its outermost shell?

Are we practising yoga?

Yoga is not the flexibility of the body, and it is not the performing of difficult, twisting postures. It asks for that same flexibility on the level of the mind — and it is there, not on the mat, that most of the work lies.

This is why the classical texts give equal weight to all eight limbs of Aṣṭāṅga Yoga. Notice what follows from that structure: of the eight, only one — āsana — acts directly on the body. You might add prāṇāyāma as a second, though its effect is more psychological than physical. That leaves six limbs whose entire concern is the steadying of the mind. Yoga, read honestly, is overwhelmingly an inner discipline. The body is where it begins, not where it lives.

The eight limbs of Aṣṭāṅga Yoga

Yama — the universal code of conduct, how one carries oneself toward all living beings: ahiṃsā (non-violence), satya (truth), asteya (non-stealing), brahmacarya (restraint), aparigraha (non-possessiveness).
Niyama — conduct turned inward, toward oneself: śauca (purity), santoṣa (contentment), tapas (discipline), svādhyāya (self-study), īśvara-praṇidhāna (surrender to the divine).
Āsana — the postures, drawn from close observation of the creatures of the natural world.
Prāṇāyāma — the regulation of the breath, and through it, the breath's hidden hold over the mind.
Pratyāhāra — the drawing-in of the senses from their endless outward pull.
Dhāraṇā — concentration; the mind held, without wandering, on a single point.
Dhyāna — meditation; that concentration deepened into a steady, conscious flow.
Samādhi — absorption; awareness resting beyond the noise of the thinking self.

Read the list again and the point becomes hard to avoid. Six of these eight — arguably seven — never touch a yoga mat. They are almost entirely absent from what the modern, accelerated versions of yoga actually teach.

What real yoga is

Look closely at all eight limbs and a different definition emerges. Yoga is not a set of postures and breathing drills. It is an art of living — one whose whole aim is a human being who is genuinely well, in body and in mind, at the same time.

And the order matters. However sound the body, a person who is not calm within cannot be called well. Much of what fractures the world — the friction between communities, the suspicion between nations, the appetite for greater power — begins in the same place: a mind that has lost its flexibility, its coolness, its ease. Yoga's answer is not a posture. It is the slow softening of that rigidity, in one person and then in the people around them.

This is also why yoga belongs to no religion and excludes no one. It asks nothing of your faith and everything of your attention. It never imposes — and this is the tell by which you can recognise the real thing from the imitation. The imitation strains; something feels forced upon the body. Real yoga only follows the natural flow. A river does not fight its way to the ocean; it arrives by its own current, and there is grace in that arrival. Yoga returns a person to their true self the same way — not by force, but by flow.

Where yoga and Ayurveda meet

None of this would surprise the physicians who wrote Ayurveda's foundational texts. Long before "mental health" became a modern phrase, Ayurveda had already refused to separate the mind from the body. It defines health itself in those terms. The svastha — the person who is truly well — is not merely someone whose doṣas, agni, and tissues are in balance; the definition closes on prasanna ātmā-indriya-manaḥ: a soul, senses, and mind that are clear and content. Physical balance without a settled mind does not meet the definition. On this, yoga and Ayurveda say precisely the same thing.

The two traditions even map the same inner terrain with the same vocabulary. Ayurveda names three qualities of mind — sattva, rajas, and tamas. Sattva is the mind that is clear, steady, and light; rajas is the restless, agitated mind; tamas is the heavy, dull, clouded one. Read the eight limbs of yoga against this and their purpose comes into focus: nearly every one of them is, in effect, a method for increasing sattva and quieting the pull of rajas and tamas. Yama and niyama order the life so the mind is not constantly disturbed. Pratyāhāra, dhāraṇā, and dhyāna train it toward stillness. Yoga is, among other things, a discipline for cultivating a sāttvika mind — which is exactly what Ayurveda considers foundational to health.

Every disease has a mental face

There is a principle in Ayurveda that sounds radical to modern ears and is in fact very old: illness is never purely of the body. Charaka describes disease as arising through both śārīrika and mānasika bhāvas — bodily and mental factors woven together. The body and the mind are not two territories that occasionally send messages across a border. They are one continuous field, and disturbance in one is already disturbance in the other.

Dr. Pardeep Sharma states the point without softening it: every disease is, in its nature, psychosomatic. There is no illness of the body that leaves the mind untouched, and no lasting disturbance of the mind that the body does not eventually carry. To treat only one half is to treat half a person.

Modern medicine, arriving by a completely different road, has begun to describe the same thing. The links are now documented across exactly the kinds of chronic conditions we see most often. Patients with celiac disease — an autoimmune condition — show a well-recognised excess of neurologic and psychiatric involvement, schizophrenia among them, to the point that celiac disease is now discussed as a contributing factor in some psychiatric presentations rather than a coincidence beside them. Ankylosing spondylitis, an inflammatory spinal disease, carries a measurably higher burden of psychiatric disorders than matched controls. And even sciatica — pain that seems purely mechanical — shows the pattern plainly: in one study of patients with sciatic pain, roughly half met criteria for depression, with a further group affected by anxiety. The body's disease and the mind's distress arrive together, again and again, across conditions that look unrelated on the surface.

The bridge is real: the neuro-psycho-immune axis

Why should a spinal disease, a gut disease, and a nerve pain all keep company with the mind? Because the mind, the nervous system, and the immune system are not separate departments. They are one communicating network. The modern field that studies this — psychoneuroimmunology, or when the hormonal system is included, psychoneuroimmunoendocrinology — describes a bidirectional traffic between brain and immune system running along the vagus nerve, the lymphatic system, and the hypothalamic–pituitary–adrenal (HPA) axis. Psychological stress is not "just in the head": it shifts immune regulation, and immune activity in turn reshapes mood, cognition, and behaviour. This same literature notes that the microglia — the brain's own immune cells — are directly involved in neuroplasticity, remodelling synapses in response not only to infection but to psychological stress itself.

This is the mechanism beneath the Ayurvedic intuition. ›: When we work on the mind, we are not offering comfort alongside the real treatment — we are acting on the same neuro-psycho-immune axis through which the disease sustains itself, and giving the nervous system's own plasticity a direction to heal in. The published reviews are explicit that this axis is clinically relevant across autoimmune and rheumatic disease, and that interventions which steady the mind — including yoga-type mind–body practice and structured attention training — produce measurable immune and neuroendocrine benefit. We treat this as sound rationale, not as a promise: cure is divine, and treatment is possible. Ayurveda works this axis as complementary to a patient's conventional care, never as a replacement for it.

And here the whole page comes together. What Ayurveda calls Sattvāvajaya — the third of Charaka's three great therapeutic approaches, alongside the spiritual (Daivavyapāśraya) and the substance-based (Yuktivyapāśraya) — is precisely the disciplining and steadying of the mind away from what harms it. Yoga, practised in full, is a living form of Sattvāvajaya. The eight limbs are not a tradition sitting beside medicine. They are the mind's medicine — and the mind, we now know, is never treating the mind alone.

This is why, at Sukhayu Ayurved, we do not treat the body as though the mind were somewhere else. A person is not a joint, or a spine, or a report. Ayurveda never let us forget that, and neither did yoga.

The taste of it

Practise yoga in this fuller sense and you feel yourself grow richer by the day, in body and in mind together. The feeling resists description. It is like the sweetness of sugar: however carefully it is explained, no account of it will do — you understand it only in the moment it is on your own tongue.

That, finally, is the meeting point of both traditions. Yoga and Ayurveda are not asking you to believe something. They are asking you to become well — steadily, naturally, from the inside out.

Cure is divine. Treatment is possible.

References

Soria V, Uribe J, Salvat-Pujol N, Palao D, Menchón JM, Labad J. Psychoneuroimmunology of mental disorders. Rev Psiquiatr Salud Ment. 2018;11(2):115–124.
González-Díaz SN, Arias-Cruz A, Elizondo-Villarreal B, Monge-Ortega OP. Psychoneuroimmunoendocrinology: clinical implications. World Allergy Organ J. 2017;10(1):19.
Jackson JR, Eaton WW, Cascella NG, Fasano A, Kelly DL. Neurologic and psychiatric manifestations of celiac disease and gluten sensitivity. Psychiatr Q. 2012;83(1):91–102. (PMC3641836)
Feki A, Sellami I, Bejaoui H, et al. Anxiety and depression among patients with chronic sciatica. Eur Psychiatry. 2024. (PMC11862519)