We tend to tell the story of who we are through the obvious relationships: parents, close friends, partners, the people whose names appear repeatedly in our personal history. But some of the most formative influences arrive at the edges, a teacher’s offhand comment, a stranger’s unexpected kindness, a colleague who modeled something you hadn’t seen before and couldn’t stop thinking about afterward.
The outsized weight of small moments Psychology has long documented the phenomenon of the “sleeper effect,” the way certain experiences embed themselves quietly and surface later with more force than their original impact seemed to warrant. A single conversation can reframe a belief you’ve held for years. A person you knew briefly can leave behind a way of seeing that outlasts every relationship you’ve maintained carefully and deliberately. The mind does not rank its influences by the amount of time they took.
The teacher you never thanked Most people, when asked, can identify at least one educator who changed the direction of their thinking, often without intending to. It is rarely the formal lesson that stays. It is the aside, the book recommended with unusual conviction, the moment a teacher treated you as someone capable of more than you’d yet attempted. David Foster Wallace’s famous commencement address, later published as This Is Water, begins with a parable about fish who don’t know they’re in water, and the best teachers are the ones who briefly made the water visible, who gave you a glimpse of the assumptions you were swimming in.
The stranger whose behavior stayed with you There is a particular category of influence that belongs entirely to people whose names you never knew. The person on a flight who handled a difficult situation with unexpected grace. The stranger who intervened quietly when something wasn’t right. These moments lodge themselves because they offer evidence of a kind of person you hadn’t previously seen modeled, and evidence, once received, is hard to unfeel. George Eliot closes Middlemarch with the observation that the growing good of the world depends on unhistoric acts, on the things done by people who lived faithfully a hidden life and rest in unvisited tombs.
The colleague who showed you something new Workplaces are underrated as sites of personal formation. Alongside the professional skills, most people absorb, without quite realizing it, entire philosophies of how to handle pressure, how to treat people with less power, how to disagree without damage. The colleague who never raised their voice in a crisis. The manager who gave credit loudly and took blame quietly. These figures shape professional character in ways that formal training rarely does, and their influence tends to compound quietly over a career.
What this asks of you The reverse implication is worth sitting with. If peripheral figures have shaped you this profoundly, you are almost certainly doing the same for people you’ll never hear from again. The comment you made in passing. The way you handled a difficult moment in public. The small generosity you’ve already forgotten. As Henry James wrote, three things in human life are important: the first is to be kind, the second is to be kind, and the third is to be kind. You rarely know which moment is the one that stays.
