Breathing into Silence: An Evening of Breath Retention, Heat and Inner Light

Tonight we sat in a circle with candles, and I guided a breath meditation that belongs to the large family of practices yoga calls prāṇāyāma. The word is often translated as “breath control”. I prefer to read it as the art and skill of breathing: not mastering the breath, but learning to be present in what the breath actually does to our experience.

This was not a relaxation exercise. It was an experiment in perception. The breath was the instrument, and the question was simple: what happens in the field of consciousness when we deliberately push the breath to its edges, and then stop?

The practice

The session began quietly. A deep breath in, a long breath out, and with the out-breath a sinking into the body, into the now. Eyes rested softly on the candle flames, or closed, whichever felt right.

Then the actual work started: a closed loop of breathing in and out with no pause between the two. I set the tempo with my voice and changed it as we went, sometimes faster, sometimes slower. The only task was to follow and to stay present to what this did to perception.

At the end of each cycle came the turning point:

• Breathe out fully, as far as you can.
• Breathe in to the maximum, then add one last little sip of air, and hold.
• Watch the silence. In this suspended space between the extreme in-breath and the out-breath there is a stillness. Notice how that silence appears in your field of consciousness, and what the body feels like now.
• Release the breath, and stay empty. Rest in the out-breath without breathing in. Let gravity take the body. Melt into the position.
• Breathe in deeply again, breathe out through the mouth, with sound if it comes, and bring the body back into awareness: its temperature, the warmth or coolness of the hands.

We did several rounds. With each round the invitation was to look more precisely: at the visual field, at the darkness behind the closed eyes, at the heartbeat and where in the body it can be felt. Some participants noticed a subtle sense of upward movement. Others noticed sensations that did not seem to fit the borders of the physical body. None of this is a goal. It is material for the witness.

In the final phase the breath became quiet again and the attention turned to the hands. First as they appear in awareness, before any movement: temperature, moisture, the palms. Then the hands rested on the knees, and we brought attention to the point between the eyebrows and compared its temperature with that of the palms. Is it the same, or is the skin between the eyes cooler or warmer?

From those three points we built an image: a triangle of heat that starts in both palms and rises to the point between the eyes. We breathed into this triangle, held, and then let go of all sensations and images, resting in what was left: the silence between the words.

We closed by rubbing the palms together until they were warm and placing them over the closed eyes. In the darkness behind the eyelids, patterns of light often appear. After this kind of breath preparation they can be strikingly vivid. Whatever light you see is simply what you see. Then the hands come together before the heart. Namaste.

Background: an old practice with a new physiology

Kumbhaka in the yoga tradition

Holding the breath is the oldest core of prāṇāyāma. In the Yoga Sutras of Patañjali (II.49–51), prāṇāyāma is described as regulating the movement of the breath, and it already distinguishes three forms: the breath held outside (after exhalation), the breath held inside (after inhalation), and a spontaneous suspension.

Later Hatha Yoga texts, above all the fifteenth-century Hatha Yoga Pradīpikā of Svātmārāma, give these retentions a name, kumbhaka, from kumbha, a pot or vessel. The image is telling: the body as a vessel that is filled and then held still. The text describes several kumbhakas, some of them preceded by forceful, rhythmic breathing such as bhastrikā, the bellows breath. Tonight’s practice used both classical retentions: antara kumbhaka, holding on full, and bāhya kumbhaka, resting on empty.

The deeper aim in the tradition was never breath-holding for its own sake. The pause was considered the doorway. When the breath stops, the mind’s habitual movement often stops with it, and what remains can be observed. That is exactly how I use it within the framework of the Inner Laboratory: the retention as a natural moment of epoché, a suspension in which the witness has room to see.

What happens in the body

The modern relatives of this practice are well known: Wim Hof breathing, Tibetan-inspired “inner fire” exercises, and various forms of connected breathing. Physiologically, the mechanism is not mysterious.

Fast, deep breathing without pauses removes carbon dioxide from the blood faster than the body produces it. The blood becomes slightly more alkaline. Typical results are tingling in the hands and around the mouth, lightheadedness, a feeling of lightness, and sometimes trembling or cramping of the hands. Because carbon dioxide, not oxygen, is the main signal that drives us to breathe, the urge to breathe is greatly reduced afterwards. That is why the retention after exhalation suddenly feels so easy and can last much longer than usual. Meanwhile oxygen saturation in the blood falls, often without the practitioner noticing.

Research has shown that this kind of breathing has real effects. The best-known study (Kox and colleagues, PNAS, 2014) found that people trained in a Wim Hof-type method showed a strong rise in adrenaline and a weaker inflammatory response to an injected bacterial toxin. That is a fascinating finding, but it is a study of a strong stress response induced on purpose, not proof of the many health claims built on it since. My own background in pharmacology makes me careful here: a measurable effect is not the same as a cure.

Heat, the point between the eyes, and inner light

The second half of the meditation draws on another layer of the tradition. The point between the eyebrows, bhrūmadhya, is in yoga the classical focus for concentration and is associated with ājñā cakra. I do not ask anyone to believe in chakras. The instruction is phenomenological: compare temperatures, notice differences, see what the imagined triangle of heat does to experience. The triangle is a tool for organising attention, not a claim about anatomy.

Warming the hands and placing them over the eyes is known in yoga and in eye-relaxation methods as palming. The light that appears behind closed eyes is called a phosphene: light perceived without light entering the eye, produced by activity in the retina and the visual system itself. Changes in blood gases and pressure on the eyes can make phosphenes more vivid, which explains why they are so striking after this breathwork. In several contemplative traditions this inner light became an object of contemplation in its own right. I explore that grammar of inner light, including phosphenes, in more detail in The Inner Laboratory.

Safety first

Because this practice deliberately changes your blood chemistry, a few rules are not optional:

• Never in or near water, never while driving, and preferably not standing. Fainting during breath retention can happen without warning, and drowning accidents have been linked to this kind of breathing.
• Avoid it or consult a doctor first with epilepsy, pregnancy, cardiovascular disease, high blood pressure, a history of panic attacks or psychosis, or recent surgery.
• Do not compete with yourself. The length of the hold is not a score. Breathe in as soon as the body clearly asks for it.
• Stop with dizziness or distress. If you feel strong dizziness, chest pain or distress, stop and breathe normally through the nose.

What remains

What participants usually remember from an evening like this is not the tingling or the light. It is the silence. For a few seconds the breath stops, the mind stops with it, and something remains that simply notices. That noticing is the real practice. The breath only opens the door.