A smile is the chosen vehicle for all ambiguities

The Curve That Hides and Reveals

On 18 May 1974, after India's first nuclear test at Pokhran, the scientists in the Rajasthan desert reportedly sent a coded message to New Delhi: "The Buddha is smiling." Few sentences capture ambiguity so completely. The Buddha's smile, an ancient emblem of compassion and peace, was chosen to announce a nuclear explosion. Was the test a peaceful experiment, as the government called it, or the first step towards a bomb? The smile carried both meanings at once and committed to neither. Herman Melville wrote in his novel Pierre; or, The Ambiguities (1852) that a smile is the chosen vehicle of all ambiguities. A smile is humanity's most universal signal and its most uncertain one, and its meaning lies less on the lips than in the intention behind it and the context around it.

To begin with, a smile seems the clearest thing in the world. An infant smiles long before it can speak, and people in every culture recognise a smile as friendliness. Yet even the body sends mixed messages. In the nineteenth century the French physician Guillaume Duchenne noticed that a genuine smile engages the muscles around the eyes, while a polite one moves only the mouth. The psychologist Paul Ekman later built on this distinction and catalogued many kinds of smiles, from the Duchenne smile of real joy to smiles of embarrassment, contempt and appeasement. The same curve of the lips can mean delight, nervousness, mockery or submission. A smile is thus not a word with one meaning but a sentence whose meaning depends on who speaks it and why.

Art and literature have long understood this. Leonardo's Mona Lisa has fascinated viewers for five centuries precisely because no one can decide whether she is content, amused, sad or secretive. Shakespeare repeatedly used the smile as a mask: Hamlet discovers "that one may smile, and smile, and be a villain", and in Macbeth Donalbain warns that "there's daggers in men's smiles". Indian tradition offers a gentler ambiguity. In the Bhagavad Gita, Krishna answers the weeping Arjuna prahasann iva, "as if smiling", and that half-smile holds both compassion for Arjuna's grief and the calm of one who sees beyond it. The smile, in these works, is where the surface and the depth of a person meet.

Moreover, societies have turned the smile into a social code. In many Asian cultures a smile may hide embarrassment or grief rather than show happiness, and a foreign visitor who reads it as pleasure misreads it entirely. The sociologist Arlie Hochschild, in The Managed Heart (1983), studied flight attendants who were trained to smile through rude passengers and long shifts, and called this emotional labour: feelings managed and sold as part of a job. The customer service smile, the receptionist's welcome and the politician's campaign grin are all performances. Women in particular have long been told to smile, and a refusal to do so is often read as hostility. Here the smile is less an expression of feeling than an obligation, and its ambiguity protects the wearer as much as it pleases the viewer.

Building upon this, diplomacy has made the smile an instrument of state. In the 1950s the slogan "Hindi-Chini bhai bhai" and the warmth of the Panchsheel agreement of 1954 seemed to promise lasting friendship, yet the border war of 1962 followed within a decade. In February 1999 Atal Bihari Vajpayee rode the bus to Lahore and signed the Lahore Declaration amid smiles and embraces; within months, Pakistani forces were found occupying the heights of Kargil. Diplomats smile because a smile commits to nothing while keeping every door open. That same quality makes it the perfect cover for intentions that cannot be stated, and the cost of misreading it can be counted in soldiers' lives.

The digital age has added new layers of uncertainty. A simple smiling emoji, meant as warmth by one generation, is read as sarcasm or passive aggression by another. Social media rewards the curated face, and the photograph of a smiling family can conceal loneliness, debt or abuse. Mental health professionals speak of smiling depression, in which a person appears cheerful at work and among friends while struggling inwardly. The smile that reassures everyone else can become the very wall that keeps help away. In a world of filters and profiles, the ambiguity of the smile has multiplied rather than diminished.

Yet it would be unjust to reduce the smile to a mask. Ambiguity is not always deceit; often it is tact, kindness or courage. A doctor who smiles while giving difficult news, a teacher who smiles at a frightened child, a soldier who smiles in a photograph sent home: each hides something, but out of care. The Vietnamese monk Thich Nhat Hanh taught that sometimes joy is the source of a smile, but sometimes a smile can be the source of joy. A smile can be the first step towards a feeling as well as its expression. Gandhi's toothless grin disarmed opponents and journalists alike, and its warmth was itself a political message of goodwill. The very openness of the smile, its refusal to fix one meaning, allows it to soften conflict, invite trust and give people room to save face.

This is why the smile carries ethical weight in public life. A civil servant who greets a citizen with courtesy offers dignity that rules alone cannot provide, and the Sevottam model of citizen-centric service rests on exactly such responsiveness. But a smile that replaces action, the polite nod that files a grievance away, betrays the citizen as surely as rudeness. The test is authenticity: whether the smile is backed by sincerity and followed by conduct. Leaders, too, are judged not by how warmly they smile at the cameras but by whether their actions honour the trust that the smile invites.

How, then, should one live with a vehicle of ambiguity? The answer lies in reading context and in cultivating sincerity. Emotional intelligence, the ability to read faces, tone and circumstance together, protects people from being fooled by false smiles and from misjudging genuine ones across cultures. Societies can reduce the burden of forced smiles by treating workers with dignity and by making it acceptable to admit distress. Individuals can resolve the ambiguity of their own smiles by aligning them with their intentions. When thought, word and deed agree, a smile stops being a riddle and becomes a promise.

There's daggers in men's smiles

Shakespeare's warning and the Buddha's serenity are both true, and that is the point. On that May morning in 1974 the smile of the Buddha could mean peace or power, and only the choices that followed would decide which. The smile will always remain ambiguous, but the character of the person behind it need not be. If people learn to read smiles with wisdom and to offer them with honesty, the most uncertain of human signals can still become the most reliable bridge between one human being and another.