Most of us know the feeling without having a name for it. The body is braced before the mind has decided anything. A notification lands and the chest tightens. A casual remark from a colleague replays for an hour. Evening arrives and the phone is still in hand, scrolling through material that does nothing for us. A recent 10% Happier episode, featuring the London-based sisters Nadia Narain, a longtime yoga and breathwork teacher, and Katia Narain Phillips, a body worker and somatic practitioner, takes this familiar state seriously and asks a practical question: if you walk around with a hair-trigger nervous system, what can you actually do in the small cracks of an ordinary day? Their answer, drawn from their book Glimmers: Tiny Moments to Transform Your Life, is not a retreat or a new belief system. It is a set of specific, repeatable practices, each short enough to fit between tasks, built around noticing the moments that already signal safety and letting the body register them.
The episode opens with what it calls Nervous System 101, stated in plain English. The autonomic nervous system runs much of the body without conscious effort, and it has two major branches that matter here. The sympathetic branch mobilizes: heart rate climbs, breath quickens, muscles prepare to act. The parasympathetic branch is the one associated with rest and digest, the state in which the body can repair, digest, and settle. Most people in modern life spend long stretches in some version of the first and rarely enough in the second.
The sisters are careful to separate two things that often get lumped together. Shutdown, the numbing that comes from doom-scrolling, dissociating, or zoning out in front of a screen, is not the same as rest and digest. It can feel like a break because it lowers the intensity of experience, but the body is not restored by it. That distinction reframes a lot of what people call relaxing. An hour of endless feeds may quiet the mind for a moment while leaving the nervous system exactly as activated, or more so, than before.
This is where the book's central idea enters. If the goal is not to escape the sympathetic state but to move through it and come back, then the question becomes which experiences actually support that return. Glimmers are the answer the book builds on.
The term comes from the polyvagal practitioner Deb Dana, who coined the frame of glimmers as the counterpart to triggers. A trigger is a cue that pulls the nervous system toward threat: a tone of voice, a crowded train, a particular date on the calendar. A glimmer is the opposite, a small cue that signals safety or connection. Sunlight on a table. A warm mug in cold hands. A song that loosens something in the chest. The sisters' point is that these moments exist in every day, and that the nervous system responds to them whether or not we notice.
The difficulty is perception. The episode highlights evolutionary negativity bias as a reason glimmers are so easy to miss. Over long stretches of human history, noticing danger was more important than noticing the pleasant absence of it, so the mind is built to register threats quickly and to log the ordinary good moments as background. Triggers are loud. Glimmers are quiet. A person can have a dozen small moments of ease in an afternoon and remember only the one irritation. Glimmers practice is, in large part, training attention to catch what the default system passes over.
That is why the book frames the work as tiny rather than dramatic. The idea is not to wait for a rare, perfect state of calm. It is to repeatedly give the nervous system small, true signals of safety, so that over time the baseline shifts. Small moments, practiced often, are the mechanism.
One of the episode's sharper lines is the phrase "if it's hysterical, it's historical," which the conversation uses to point at childhood protective patterns that keep running in adult life. A reaction that seems wildly out of proportion to the present moment often has a history. The nervous system learned, early on, which responses kept a person safe, and it continues to deploy them when a current situation resembles an old one, even faintly. The conversation about relationships in the episode follows from this: a partner's tone or a friend's silence can set off a response that belongs to a much earlier scene.
This matters for how one approaches the practices. If the aim were simply to be calm all the time, every flare of reactivity would become a failure. The episode argues against that goal. The real target, as the sisters frame it, is flexibility: a nervous system that can move between activation and settling and handle whatever arrives. A flexible system is not one that never gets activated. It is one that returns. That reframing lowers the stakes of each difficult moment and makes the daily practices feel less like a test.
The episode is built around concrete exercises, and its usefulness lies in their brevity. The first is a glimmer check-in, a short, repeatable noticing exercise that asks you to pause and register what in the immediate environment, or in the body, signals ease. The goal is not to produce a feeling on command but to build the habit of seeing the small good thing that is already there.
Host Dan Harris offers his own version as an example. His pre-bed shower practice, discussed in the episode, works as a kind of glimmer scan: a daily point at which the day's sensations are gathered and noticed rather than rushed past. The example is useful precisely because it is ordinary. Nobody needs a special space to do this.
The second practice is facial tension release, which includes placing the tongue against the inside of the cheek and a gentle jaw rub. The episode is candid that this sounds odd, and it is. But the face is densely connected to the nervous system, and many people carry chronic tension in the jaw without knowing it. Loosening that tension is a direct way of sending the body a message that the threat level has dropped. The conversation links this to Kristin Neff's research on self-compassion through touch, which the sisters present as more grounded than its unusual sound suggests.
The third practice is shake it off, which borrows from something animals do after a stressful event. A deer that escapes a predator often trembles and shakes before going back to grazing. Most people, by contrast, hold the residue of a stressful moment in the body and carry on. Deliberately shaking out the limbs gives the physical charge somewhere to go. It is one of the simplest discharges available.
The fourth practice is opening the visual field. Narrow, focused attention is a common signature of threat, and widening the gaze to take in the edges of a room or a landscape can signal to the nervous system that there is room to breathe. The episode ties this to Dan's own experience of claustrophobia on airplanes, where he reports that this practice helps.
The fifth practice is daily chores as meditation. The episode draws on a lesson from a Thai Vipassana retreat, where ordinary tasks are done with full attention. Washing dishes, folding laundry, or walking to a bus stop becomes a field of practice rather than an interruption to be cleared. This connects to a broader point the episode makes about speediness, which it describes as one of the most problematic aspects of modern life. Hurry keeps the system braced. Slowing down, even inside a task, reopens the parasympathetic door.
Speediness is the quiet thread running through the whole episode. When life is organized around urgency, the body never gets the signal that it can stand down. Each small hurry adds a little to the sympathetic load. The five practices are, in part, a way of interrupting that pattern at its smallest unit, the transition between one thing and the next. The episode's inclusion of a classic Good Samaritan seminarian study, cited in its outline as a way of examining how hurry affects helping behavior, points to how much this pressure shapes what people do with their attention and kindness. The study is one the episode uses to make the case, and the description does not expand on its findings, so it is worth reading the source directly.
If the ideas here landed, the most useful next step is to choose one practice and do it at the same time each day for a week. A glimmer check-in in the morning, a jaw release before a difficult call, or an opened gaze on a crowded commute are all small enough to actually happen. Expect the first attempts to feel unremarkable. That is the nature of the work.
For the full set of practices and the sisters' reasoning, the book Glimmers: Tiny Moments to Transform Your Life by Nadia Narain and Katia Narain Phillips is the place to go. The episode itself is a good companion, especially for listeners who want to hear how the ideas sound in conversation. Both point toward the same conclusion: the nervous system does not need a dramatic overhaul to change. It needs repeated, ordinary evidence that the moment is safe enough to stop bracing.
