Where Our Threes Come From

The pattern we noticed

Three is the smallest structure that can hold a tension without collapsing it. Two forces oppose; a third relates.

Across traditions, centuries, and continents, people describing inner growth kept reaching for this shape — not because they agreed on what the three are, but because growth itself feels like holding two truths while a third thing slowly forms.

That observation is the entire foundation of this app. Nothing more mystical than that — and nothing less interesting.

What we claim, and what we don't

We claim: that three-part structure is a recurring, useful design for reflective practice, and that we found it in many places independently.

We do not claim: that the traditions below are equivalent, interchangeable, or "really saying the same thing." They are not. Each concept carries deep, distinct meaning within its own tradition, defended and debated by people who have devoted their lives to it. We encourage you to explore each at the source — and we link to sources chosen by those traditions' own scholars, not by us.

If we have described any tradition inaccurately, we want to know. See Corrections at the bottom of this page.

The living traditions that inspired us

The Christian Trinity.

One God in three persons — Father, Son, and Holy Spirit. For Christians this is not a growth framework or a metaphor; it is a central mystery of faith concerning the nature of God. We take from it only the witness that a two-thousand-year-old tradition found threeness essential to describing ultimate relationship.

The Hindu Trimurti.

Brahma, Vishnu, and Shiva — the cosmic functions of creation, preservation, and dissolution. A reminder that transformation is not one motion but a rhythm: things must be sustained, and things must end, for anything new to begin.

The stages of the nafs in Islamic thought.

The Qur'an speaks of the self that commands toward wrongdoing (an-nafs al-ammāra), the self that reproaches itself (an-nafs al-lawwāma), and the soul at peace (an-nafs al-muṭmaʾinna). Sufi teachers developed this into a genuine map of inner refinement — perhaps the closest ancestor to what this app attempts: disciplined, staged work on the self.

The Buddhist trikāya.

In Mahāyāna Buddhism, the three bodies of a Buddha — dharmakāya, saṃbhogakāya, nirmāṇakāya — describe how awakened reality manifests. We cite it humbly, as one more independent arrival at threeness in a tradition that owes nothing to the others above.

These four did not borrow from each other. That independence is the point.

The philosophical and psychological lineage

Plato

argued in the Republic that the human soul has three parts — reason (logos), spirit (thymos), and appetite — and gave us the chariot image: a charioteer guiding two powerful, opposing horses. Growth, for Plato, is not eliminating the horses. It is learning to drive.

G.W.F. Hegel

's account of how ideas develop is popularly summarized as thesis, antithesis, synthesis — two positions in tension, resolved by a third that contains and surpasses both. (Scholars will note Hegel rarely used those exact words; the summary is a simplification, and we present it as one.)

Carl Jung

treated the triad as an intrinsically dynamic structure — energy in process, striving, unresolved. This matters to us: it means a three-part practice describes movement, not arrival. You are never "done" with a triad. You cycle through it.

We cite these as thinkers who found three-part structure useful — the same honest register as the traditions above, and no stronger.

The evidence that this practice is needed now

This is the part of our foundation that rests on data, not interpretation. We deliberately do not lean on a single research house. The finding matters because it appears independently in four countries' national statistics, in academic surveys running for fifty years, and in a demographic synthesis spanning 201 countries — instruments run by institutions with no stake in each other's conclusions. Every figure below links to its primary source.

The United States.

The General Social Survey, run since 1972 by NORC at the University of Chicago, has asked the same question for fifty years. In 1972, 5% of American adults answered "no religion." By 1990 it was 8%; by 2012, 20%; by 2021, 29%. PRRI's Census of American Religion, drawing on a sample of 40,000, put the religiously unaffiliated at 28% in 2024 — its highest reading, though PRRI also notes the growth is now slowing. Gallup, measuring a different thing on a longer timeline, found formal membership of a church, synagogue, or mosque falling below half the adult population in 2020 for the first time since it began asking in 1937.

Europe.

In the 2021 census of England and Wales, "no religion" rose to 37.2% — 22.2 million people — from 25.2% a decade earlier, while Christian identification fell below half (46.2%) for the first time in the history of the census. Among the young the picture is starker: a 2018 study of European Social Survey data across 22 countries found that in twelve of them, more than half of 16-to-29-year-olds claimed no religion at all — 91% in the Czech Republic, 70% in the United Kingdom, 64% in France. That study was commissioned by the Catholic Church itself, to inform a Synod of Bishops. It was not written by anyone hoping for that result.

Beyond.

In Australia's 2021 census, "no religion" reached 38.9%, up from 22.3% in 2011 — close to doubling in a decade, and now the most common single answer to the religion question, though Christianity taken as a whole remains larger at 43.9%. In Canada, the religiously unaffiliated reached 34.6% in 2021, from 16.5% in 2001. And it is not only an Anglophone story: Pew's demographic synthesis, built from more than 2,700 sources across 201 countries — national censuses, population registers and demographic surveys — found the religiously unaffiliated grew by 270 million between 2010 and 2020, reaching 1.9 billion people, or 24.2% of humanity. Ten countries and territories now have an unaffiliated majority, up from seven a decade earlier; the three that joined were Uruguay, the Netherlands and New Zealand, alongside Japan, Vietnam, the Czech Republic and others already there.

And almost none of them stopped being spiritual.

This is the finding that matters most to us. Of American "nones," only 17% call themselves atheist and 20% agnostic; the clear majority — 63% — answer "nothing in particular." Most of them believe in God or a higher power. Pew's international work finds the same pattern across many countries: substantial shares of the world's more than a billion religiously unaffiliated people hold spiritual beliefs. And among Americans who call themselves spiritual, most define spirituality as connection — to something bigger than themselves, and to their own true self.

Read those last two findings together and you can see the two horses: the pull toward the self, and the pull toward what is beyond the self. This app's third element — service, action, practice — is the charioteer that relates them.

Hundreds of millions of people now stand outside the old structures. Many inside them are just as unpracticed. What was lost, in both cases, was not belief. It was rhythm, discipline, and companionship in practice. That is the concrete thing this app rebuilds.

Three honest caveats. The GSS jump from 23% in 2018 to 29% in 2021 coincided with a change in how the survey was administered, from in-person to largely online; some of that rise may be method rather than movement. PRRI's own reading of its data is that the growth of the unaffiliated has slowed since the early 2020s. And the trend is regional, not planetary: across the same decade Islam grew faster than any other major religion, and sub-Saharan Africa overtook Europe as the home of most of the world's Christians. Secularisation is a Western and East Asian story, not a human one. We report the numbers that complicate our case alongside the ones that make it.

Sources: General Social Survey, NORC at the University of Chicago · Pew — How U.S. religious composition has changed (2022) · PRRI — 2024 Census of American Religion · Gallup — U.S. Church Membership Falls Below Majority (2021) · Office for National Statistics — Religion, England and Wales: Census 2021 · Bullivant, Europe's Young Adults and Religion (2018), Benedict XVI Centre & Institut Catholique de Paris, using European Social Survey data · Australian Bureau of Statistics — Census 2021 · Statistics Canada — Census of Population 2021 · Pew — How the Global Religious Landscape Changed From 2010 to 2020 (2025), doi:10.58094/fj71-ny11 · Pew — Global unaffiliated population change (2025) · Pew — Who are religious 'nones' (2024) · Pew — Religious 'Nones' in America (2024) · Pew — Spirituality Among Americans (2023) · Pew — Many religious 'Nones' around the world hold spiritual beliefs (2025).

Why 28 days, why 13 cycles, why a day outside time

Our year is thirteen 28-day cycles — a rhythm loosely aligned with the moon, chosen because a month is long enough for something to change in you and short enough to begin again without dread. Each cycle moves through three phases: Self, Others, Service — nine days each, with one integration day to close.

Your cycles begin the day you join and unfold in order — your first is always the first, whenever you arrive. And once a year, on a single date shared by every member everywhere, all cycles pause for a day that belongs to none of them. Many calendar traditions kept exactly such a day — a day out of time. Ours has no prompt and asks nothing of you. It is the day we publish our annual transparency report, and the day members vote on the giving third.

(To be practical and honest: your subscription, if you ever choose one, bills on ordinary calendar months. The lunar rhythm is how the practice breathes, not how the accounting works. We see no reason to pretend otherwise.)

Who makes this, and where the money goes

This app has a named founder — Jo, from Mauritius — not a brand persona. Everything Tercet earns — net of payment fees and taxes we merely pass through — is split three ways: one third to the people who build it (a hard cap, never exceeded), one third reinvested in the work, one third given to charity — split by member vote across a shortlist vetted by independent evaluators. The figures are published, receipts and all, on our transparency page every year, on the day outside time.

We did not build this because we walked away from anything. Jo still plays music for his parish when they ask — and at Hindu and Tamil weddings, at adorations, at Christian ceremonies and gospel nights, wherever a pair of hands is needed. His closest friends include people who read the Vedas, people who pray five times a day, and people who believe in no god at all. On this island that is not remarkable; it is Tuesday.

What we noticed is something else: that almost nobody now has a daily practice. Not the ones who left, and not always the ones who stayed. That is the gap Tercet is built for — and it is why the app never asks what you believe, and never needs to know.

How Tercet is paid for

Most apps hide how they make money and hope you never ask. We'd rather write it down.

You pay us. Nobody else does.

One subscription is the whole of our income. No advertising, no investors to satisfy, no data sold, no third party paying for access to you. This is the only arrangement under which the privacy doctrine below can be true, so it is not a business preference — it is a structural requirement.

You live a full cycle before you decide.

Twenty-eight days and the integration day that closes them, with nothing held back or degraded. A shorter trial would contradict everything this practice claims about slowness; you cannot judge a 28-day rhythm in a week. On the closing day we show you your first entry beside your last, so that whatever you decide, you decide having seen the thing work.

Why we are not free.

A reflection app carrying millions of people's inner lives at no charge has to be paid for somehow — and every mechanism available to it (advertising, data, investors demanding growth) is a mechanism we have promised never to use. We would rather ask you plainly for a small amount of money than build something whose real customer is somebody else. There is no free tier because there is no honest way for us to fund one yet. If Tercet ever earns enough to carry one, we will say so here and open it.

If you cannot afford it.

Write to us and say so. We will say yes. There is no form, no proof, no means test, and no time limit — and we will never mention it again. A practice that turns people away over money is not a practice we want to have built.

Your words are not the hostage.

If you stop paying, you keep permanent, free access to export everything you ever wrote, in a format you can read without us. Not for thirty days — always. We rent you a practice; we do not hold your inner life against a subscription.

(One more thing, because it is our trade: the annual transparency report will publish what each member actually costs us to serve — infrastructure, per person, per month. We may be the only journal on the internet that shows you its cloud bill. That seems like exactly the kind of thing a practice built on honesty should do.)

Corrections

We describe traditions that are not ours. If you are a scholar or practitioner and we have gotten something wrong — in emphasis, in terminology, in spirit — write to us. Corrections are published, credited, and welcomed. Being correctable in public is part of the practice.