When I first arrived in Vietnamm more than a decade ago, my calendar filled up fast. There was a big group of us, most weeks had at least one meetup, and I thought this was just how expat life worked. Five years on, the number of people I would make plans to see had shrunk to about five. Some of that is the churn of a mobile life, people leaving for the next city, the next job. Some of it is that I have never found making and keeping friends easy. I read a lot of Stoic philosophy during a rough stretch when I was casting around for something solid to stand on, and one line from Seneca stayed with me long after the reading stopped:
“The wise man is self-sufficient. Nevertheless, he desires friends, neighbours, and associates, no matter how much he is sufficient unto himself.”
A quick note before I go further: I am not a psychologist or a doctor, and this is reading and reflection, not advice. The research below comes from particular groups of people studied over time, not settled rules that map neatly onto any one life, including yours.
The Stoic paradox: sufficient, yet still wanting people
The line comes from Seneca’s ninth letter, on philosophy and friendship. He argues that the wise man “desires friends, neighbours, and associates, no matter how much he is sufficient unto himself.”
That looks like a contradiction until you read the distinction he draws right after. Seneca held that “in this sense the wise man is self-sufficient, that he can do without friends, not that he desires to do without them.” That is the whole hinge, as far as I can tell. Being able to survive alone is not the same as wanting to. The wise person builds a friend rather than shopping for one to fill a gap, because a friendship that exists only to plug a hole in you is fragile. It ends the moment the hole is filled some other way.
He even grants that the pull toward other people is built into us. In Seneca’s view, “as we hate solitude and crave society, as nature draws men to each other, so in this matter also there is an attraction which makes us desirous of friendship.” I would soften that a little from my own chair, since not everyone feels being alone the same way. But the direction of it feels right to me.
Eighty years of data landing on the same place
What surprised me is how neatly a very modern, very unromantic pile of evidence lines up behind a Roman letter. The Harvard Study of Adult Development has been running since 1938, tracking 724 men and, more recently, their descendants, checking in on their health and their lives decade after decade.
The headline finding is blunt. Its longtime director, psychiatrist Robert Waldinger, put it this way: “good relationships keep us happier and healthier.” When the researchers looked for what predicted who aged well, it was not cholesterol. The study found that how satisfied people were with their relationships at age 50 predicted their later physical health better than their cholesterol did. The people who fared best, Waldinger found, were “the people who leaned into relationships, with family, with friends, with community.”
It is one study, long-running and careful, but still a portrait of a specific set of lives rather than a law of nature.
It sits inside a wider picture, though. A 2010 review by Julianne Holt-Lunstad and colleagues pooled 148 studies and more than 300,000 people. It found that stronger social connection was linked to 50 percent greater odds of survival. Seneca framed friendship as a good life. The data reframes it, less poetically, as a longer one.
Wanting people from fullness, not from lack
Here is where Seneca’s distinction did real work for me. When I look back at my Vietnam group thinning out to five, I do not read it mostly as loss. It reads more as clarifying. Most of those five are people I am close to, and I hold no illusion that I couldn’t have grown close to some of the ones who left if the timing had been different. The number got smaller and somehow more honest.
The frame I keep coming back to is the difference between wanting people because your life is full and needing them because it feels empty. Reaching for others because you cannot stand your own company is a different act from reaching for them because your life is already good and you want to share it. The first tends to grip too hard. The second can hold loosely, which is probably why it lasts. Waldinger has a line I like here: tending to relationships “is a form of self-care too.” The mobile expat life makes that tending more difficult. Connections do not maintain themselves across a departure gate so tend we must.
The frame I’ve landed on
I am not going to pretend this is a program anyone should follow. It is just the frame I have come to. I have been married about five years now, and having someone I actually live with fits the Seneca shape more cleanly than anything else I could point to. Not someone plugging a gap, but someone I would still want around on the days I feel entirely fine on my own.
And I do enjoy my own company. Just, if I am honest, only for so long.
If the quiet is starting to feel less like solitude and more like something heavier, talking to a counsellor or therapist is worth more than any letter, ancient or otherwise.




