sleep and dreams
How does yoga nidra relate to traditional concepts of sleep and consciousness in Hindu texts?
What the texts say
The phrase yoga nidra appears in Puranic tradition, including the Devi Bhagavata and the Markandeya Purana. There it describes the deep, cosmic sleep of Vishnu. Between cycles of creation, Vishnu rests on the great serpent Shesha, floating on the primordial waters. This rest is not ordinary sleep. It is a state of deep stillness in which awareness is withdrawn from the world but the divine presence remains. Yoga nidra here is something vast, a quality of consciousness that belongs to the divine, not a technique a person practises.
The connection to Patanjali
Patanjali's Yoga Sutras describe a stage called pratyahara, the withdrawal of the senses inward. This is one step on the path toward deeper concentration and meditation. Yoga nidra as a practice is often linked to this idea. The practitioner pulls attention away from the outside world and rests in a state between sleeping and waking. The Sutras do not use the term yoga nidra themselves, but the state they describe as pratyahara is close to what later teachers pointed to with that phrase.
The state itself
Hindu thought maps consciousness into layers. Waking, dreaming, and deep dreamless sleep are three well-known states. The tradition also speaks of a fourth, sometimes called turiya, a witnessing awareness that underlies the other three. Yoga nidra, in the traditional sense, sits somewhere between deep sleep and this witnessing state. The person is not fully awake, not dreaming, not lost in blank unconsciousness. Something remains present and aware. This is what makes it different from ordinary rest.
How it is practised today
The structured practice most people know today was developed and spread in the twentieth century by Swami Satyananda. It uses a guided process, body scanning, breath awareness, and moving between relaxation and gentle attention, to bring a person into that in-between state. This modern form draws on the traditional ideas but is a systematized technique, not a direct continuation of the Puranic descriptions. Today it is taught widely, both inside and outside Hindu communities, and is often framed in wellness terms. Whether the two uses of the term, the cosmic sleep of Vishnu and the guided relaxation practice, describe the same thing or only share a name is something teachers and practitioners understand differently.