There is a deep Vedic teaching that requires no laboratory and no belief. It only requires the fact that you slept last night.
If you slept deeply, the kind of sleep with no dream, no image, not even the quiet murmur of an inner voice—then something remarkable happened, and you were the only witness to it. Your body disappeared. Any pain you had went with it. Your bedroom slipped away, and so did the whole outside world.
When you woke, you did not say, “I was somewhere else.” You said, quite simply, “I slept well. I knew nothing.”
That knowing-of-nothing is worth noticing. It is the door you walked through as you slept.
What actually happened while you were gone
Deep sleep is not like anesthesia, where machines still track a metabolism. It is not dreaming, either, where images and story fragments keep unfolding. The Vedic tradition calls it sushupti—the interval when the entire architecture of experience is set aside.
Aches and pains, along with muscle tension, no longer exist. They do not continue quietly in the background, because there is no background. There is no place for them to be, and the one who would notice them is also not there.
And yet you were not extinguished. Something remained, because in the morning you can report on the absence. You can say, with confidence, “I was not aware of anything.” Awareness itself did not go anywhere. Only its contents—thoughts, images, sensations—were gone.
Patañjali’s quiet radicalism
This absence is more fruitful than it sounds. In the second sūtra of the Yoga Sūtras, Patañjali defines yoga as citta-vṛtti-nirodhaḥ, the stilling of the whirlings of mind. Every experience, he says, is a vṛtti: a modification, a turning within consciousness. Perception is a vṛtti. Memory is a vṛtti. Imagination is a vṛtti. Sleep is a vṛtti. Even the certainty that we are right about something is a vṛtti.
Notice what he is doing. He places everything you have taken to be reality, the pen in your hand, the pain in your knee, the person across the table, the belief you hold about yourself, on the same playing field. Some vṛttis are stable and recurring, some are fleeting, but none is more than a modification of awareness.
Apply this to something ordinary, like pain in the knee or lower back. Pain has a physical quality, a location (“in the knee”), and an unpleasant feel. All three are appearances arising within awareness, not properties of anything standing outside it. The knee itself is a further vṛtti, no different in kind from the pain that seems to live in it. The body is a vṛtti. The world through which the body walks is a vṛtti. Every night the whole collection is set down, and something remains that witnesses the vanishing.
But wasn’t the body still there?
Someone will object that the body was still there while you slept. The nerves kept firing quietly, the neurons kept their patterns ready for morning. All true. But look closely at the claim.
It assumes what it is trying to prove—a body existing on its own, apart from anyone’s experience of it. Every such statement is made from inside waking awareness and describes what someone would see if someone were looking. It is a promise, not a witnessed fact. As Shankara put it in a quieter, more devastating way: existence that is never witnessed by anyone is not really existence at all. It’s only a concept of existence. To be is to appear, and to appear is to appear to awareness.
Modern brain science is fascinating on this point, but it does not overturn it. Studies of default mode networks, of how the brain processes pain during sleep, of the neural signatures of dreamless states—all of them describe patterns within waking experience. They tell us how the appearance of a body-in-pain gets built. They do not tell us that the builder is itself a body. The brain is a pattern within consciousness, not the source of it. Science verifies the vṛttis. It cannot step outside them, because no one can.
Real, but not what you thought
One caution. The deep sleep argument in Yoga and Vedanta does not say that pain is unreal, or that the body is a hallucination. It does not give anyone permission to walk away from suffering, their own or another’s, by calling it illusion. That is spiritual bypass, and it produces cruelty dressed up as wisdom.
The teaching is subtler. Pain and body and world are real, but they do not stand on their own. They are real the way a rainbow is real: undeniable, describable, and yet not made of anything you could take down from the sky and weigh in your hand. Fully real as appearance, and completely empty of independent substance.
This matters for anyone who is suffering. You do not say to a person in pain, “your pain is unreal.” You meet them with the recognition that the pain, and the knee, and the one who has the knee are all arising together in the same awareness—and that awareness itself is never in pain. This is a wider perspective, and it is a humane one.
The one to whom this appears
Every night, with no effort, no belief, no technique of any kind, you release the entire physical universe. You lay it down. The body you carried around all day, the pains that mapped it, the world in which it moved—set down effortlessly, the way one lays down a garment.
In the morning you pick it back up. The body reappears. Any pain that was there reappears with it. The world assembles itself around the bed, and you enter the day as if the setting-down never happened.
But it did happen. And the fact that you were the silent witness of its happening is the whole teaching. The one to whom body and pain and world appear is not any of them. The tradition calls this turiya, the fourth—the awareness common to waking, dream, and dreamless sleep, the one that was never asleep even while the sleeper was. You do not have to travel anywhere to find it. You only have to notice what has been true every night of your life: something in you knew the nothing. Pure being.
A practice, offered quietly
Tonight, as you lie down, place attention gently on this thought:
In a few moments, my body will disappear. My pains will disappear. The world will disappear. And I will be untroubled by any of it, because the one who watches all of this go is not made of any of it.
Do not try to stay awake to catch the moment. Let sleep take you.
In the morning, before the day rushes in, notice the small interval when you know you slept and the body has not yet fully reassembled. Rest there for one breath. Two. That interval is not empty. It is the same awareness that carried you through the night, and it is what you actually are.
The body will reassemble. Any pain you are used to will likely return. The world will offer its thousand appearances. Let them. You already know, from last night and every night, that none of these is what you are.
Namaste,
Deepak
Deepak’s latest book, Awakening in the Final Chapter is available for pre-order now and publishes September 8. Reserve your copy today so it arrives the moment it’s released.

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