Open a typical yoga class schedule and you will find poses, maybe some breathing, and sixty seconds of sitting at the end. Open the Yoga Sutras — the roughly 1,700-year-old text by Patanjali that most yoga philosophy traces back to — and you find an eight-part framework in which physical postures occupy exactly one part, and get about three sentences. The gap between those two pictures is the single most useful thing to understand about where modern yoga came from and what it quietly left behind.
The framework is called ashtanga — ashta (eight) plus anga (limb). Yes, the same word as the sweaty style of yoga; that school borrowed the name from this list. A "limb" is a good translation: the eight parts are meant to grow from one trunk, not to be checked off in order like a to-do list. Still, the sutras present them in a sequence, and the sequence has a logic — from how you treat other people, inward through the body and breath, to what attention itself can do.
The eight, in plain English
1. Yama — how you treat the world
Five restraints: non-harming (ahimsa), truthfulness (satya), not stealing (asteya), right use of energy (brahmacarya), and non-grasping (aparigraha). These are not commandments; they read more like experiments in not making your own life harder. We cover them in detail on the yamas and niyamas page.
2. Niyama — how you treat yourself
Five observances: cleanliness (saucha), contentment (santosha), disciplined effort (tapas), self-study (svadhyaya), and surrender to something larger (ishvara pranidhana). Where the yamas point outward, the niyamas point at your own habits — including, usefully, your habits on the mat.
3. Asana — posture
Here they are: the poses. All of them, in one limb. And Patanjali's actual instruction about asana is famously brief — the posture should be sthira sukham, steady and comfortable. He was almost certainly talking about a seat for meditation, not a vinyasa flow. The sprawling pose library of modern yoga is a later, mostly 20th-century, development. Useful, physical, real — but historically new.
4. Pranayama — breath regulation
Once the body can sit still, the breath becomes the next object of training: extending it, slowing it, pausing it. Modern pranayama covers everything from calming alternate-nostril breathing to vigorous breath of fire, and it is the one limb besides asana that survives intact in most studios.
5. Pratyahara — turning the senses inward
Pratyahara is the hinge of the whole system: withdrawing attention from the senses, the way a turtle pulls in its limbs, as one classic image puts it. Every time you close your eyes at the end of class and the room's sounds stop mattering, you have touched it. It is less a technique than a threshold.
6. Dharana — concentration
Dharana means holding attention on one thing — the breath, a mantra, a candle flame — and bringing it back each time it wanders. This is the part everyone who has tried meditation knows intimately: the wandering, and the returning.
7. Dhyana — meditation
When the returning stops being a struggle and attention rests on its object continuously, concentration ripens into dhyana — meditation as a state rather than an effort. The distinction is subtle but honest: dharana is something you do; dhyana is something that happens when the doing settles.
8. Samadhi — absorption
Samadhi is the final limb: absorption so complete that the sense of a separate observer thins out. Traditions describe it as the goal of the whole path. A practical note: you do not need to chase it, and anyone selling guaranteed samadhi is selling something else. The honest version is that limbs six through eight describe a spectrum of settling that every meditator samples in small, ordinary doses.
How the limbs fit together
The usual summary: limbs one and two clean up your relationship with the world and yourself, three and four make the body a tolerable place to sit, and five through eight train the mind in stages. The sequence is descriptive more than mandatory — nobody masters non-grasping before attempting a forward fold — but the underlying claim is worth taking seriously: a stable ethical life and a comfortable body are not spiritual decoration; they are what make a quiet mind possible. It is hard to meditate when your conscience is loud or your knees are screaming.
What a modern practitioner can actually use
- It reframes a "bad" practice. A day when your hamstrings won't cooperate but you told the truth and sat quietly for five minutes was, by Patanjali's accounting, a full day of yoga.
- It explains the poses' real job. Asana as training to sit — steady and comfortable — changes how you practice it. Comfort becomes a feature, not a failure.
- It gives the ethics back. The yamas and niyamas work well as a monthly focus: pick one, watch where it shows up on and off the mat.
- It demotes nothing you love. If you only ever practice limb three, that is genuinely fine — but knowing the other seven exist keeps the one from inflating into something it was never designed to be.
Patanjali devoted roughly three sutras to posture and entire chapters to attention. Modern yoga inverted the ratio. Neither is wrong; but it is worth knowing which book you are actually reading from.