Reflections on Friendship, Solitude, and the Stoic Wisdom of Seneca
When I first arrived in Vietnam more than a decade ago, my calendar filled up fast. There was a big group of us, and most weeks had at least one meetup. At the time, I thought this was just how expat life worked: a constant buzz of social activity and connection. However, five years on, the number of people I regularly made plans to see had shrunk to about five. This shift was partly due to the natural churn of a mobile life—friends moving on to new cities or jobs—but also because making and maintaining friendships has never been easy for me.
During a particularly challenging stretch, I turned to Stoic philosophy for grounding and stability. One line from Seneca, a Roman Stoic philosopher, stayed with me long after I finished reading:
“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
Seneca’s ninth letter, on philosophy and friendship, explores this paradox in depth. He argues that the wise man “desires friends, neighbours, and associates, no matter how much he is sufficient unto himself.” At first glance, this seems contradictory. How can one be self-sufficient yet still desire companionship?
The key lies in Seneca’s own clarification: “in this sense the wise man is self-sufficient, that he can do without friends, not that he desires to do without them.” In other words, the ability to live independently does not negate the natural human longing for connection. The wise person seeks friendship not to fill a void but to build genuine bonds. Friendships born solely from a need to plug an emotional gap tend to be fragile—they last only as long as the need exists.
Seneca also acknowledges the innate human attraction to social connection: “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.” While individual experiences with solitude vary, this general pull toward others resonates on a fundamental level.
Modern science echoes ancient wisdom
What surprised me most was how a very modern, data-driven perspective aligns so neatly with Seneca’s ancient insight. The Harvard Study of Adult Development has been running since 1938, tracking the lives of 724 men and, more recently, their descendants across decades. The study’s headline finding is straightforward: good relationships keep us happier and healthier.
Robert Waldinger, the study’s longtime director and a psychiatrist, succinctly states, “good relationships keep us happier and healthier.” When researchers examined predictors of healthy aging, satisfaction with relationships at age 50 proved more telling than cholesterol levels in forecasting physical health later in life. Those who “leaned into relationships, with family, with friends, with community” fared best overall.
While this study offers insightful data, it represents one specific cohort and is not a universal law. Nevertheless, it sits within a broader scientific consensus. A 2010 meta-analysis by Julianne Holt-Lunstad and colleagues, which pooled 148 studies covering over 300,000 people, found that stronger social connections are linked to a 50 percent greater likelihood of survival. Where Seneca framed friendship as a core element of the good life, modern science reframes it as a key to longevity.
Wanting people from fullness, not from lack
Seneca’s distinction between being self-sufficient and desiring friendship helped me reframe my own experience. Looking back on my shrinking Vietnam social circle, I no longer see it primarily as loss but as a process of clarifying what matters most. The five friends I remain close to are those with whom I share genuine connection. While timing and circumstances might have allowed for closer bonds with others, the smaller circle feels more honest and intentional.
The difference between reaching out from a place of fullness versus from a place of emptiness is profound. Seeking others because your life is already rich and you want to share it tends to foster relationships that are flexible and enduring. In contrast, reaching out because you cannot stand your own company risks clinging too tightly, which can strain friendships. Waldinger captures this well, noting that “tending to your relationships is a form of self-care too.” Yet, the mobile expat life complicates this care, as maintaining connections across distances requires conscious effort.
The frame I’ve landed on
I want to be clear that this is not a one-size-fits-all program but rather the perspective I’ve grown into over time. Having been married for about five years now, living with someone who fits Seneca’s model of friendship feels more tangible than any other relationship in my life. It is not about filling a void but about choosing to share life with someone I would want around even on days when I feel completely self-sufficient.
And honestly, I do enjoy my own company—just, 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.
