There is a line by the German-American theologian Paul Tillich that reappears in many conversations about aloneness: “Language has created the word ‘loneliness’ to express the pain of being alone, and the word ‘solitude’ to express the glory of being alone.” (The Eternal Now, Charles Scribner’s Sons, 1963.) It is the kind of sentence that feels immediately true, and whose truth deepens the longer you sit with it.
The distinction matters practically. People who experience chronic loneliness often report an inability to access solitude — to be alone without the intrusion of painful social absence. People who are skilled at solitude can be genuinely and productively alone for extended periods without that aloneness reading as deprivation. The capacity seems trainable. The books below approach this from different angles: clinical, philosophical, literary, and contemplative.
1. Anthony Storr — Solitude: A Return to the Self (Free Press, 1988)
The British psychiatrist Storr wrote this book partly as a counter-argument to the assumption — dominant in mid-20th-century psychology — that intimate relationships are the primary source of human meaning. Drawing on biographies of creative figures (Newton, Kafka, Wittgenstein, among others) alongside clinical observation, Storr argues that the ability to be alone is not a developmental failure or a sign of emotional damage. For many people, and for many kinds of work, it is a necessity.
Storr is careful not to romanticize. He distinguishes between solitude that supports creative or spiritual development and isolation that accompanies depression or schizoid withdrawal. But his core argument — that the culture overvalues intimate attachment as the criterion of psychological health — remains provocative and underread.
Best for: Readers who suspect their comfort with solitude is seen as a problem by others, or by themselves.
2. Rainer Maria Rilke — Letters to a Young Poet (trans. Stephen Mitchell, Random House, 1984)
This is not a book about solitude in the clinical sense. It is a series of letters written between 1902 and 1908 by Rilke to a nineteen-year-old military cadet who had sent him poems and asked for advice. What Rilke offers is mostly instruction in how to be alone with one’s own experience — particularly with the questions that do not have answers.
The most cited passage is Letter Four: “I would like to beg you, dear Sir, as well as I can, to have patience with everything unresolved in your heart and to try to love the questions themselves as if they were locked rooms or books written in a very foreign language.”
The Mitchell translation is elegant; Karl Shapiro’s earlier version (Norton, 1954) is more literal. Read either alongside the other.
Best for: Anyone in a period of life-transition where the pressure to resolve uncertainty is high.
3. Robert Kegan and Lisa Laskow Lahey — Immunity to Change (Harvard Business Review Press, 2009)
This is a less obvious choice, but relevant. Kegan and Lahey’s framework for understanding why people don’t change even when they want to — what they call “competing commitments” — is a useful lens for understanding why many people can’t tolerate solitude. The hidden assumption, in their model, would be something like: I am committed to being alone but I also have a deep commitment to having evidence that people want me. Solitude threatens the second commitment.
The book’s methods are designed for organizations, but the underlying developmental psychology (drawing on Kegan’s earlier theory of adult stages in The Evolving Self, Harvard University Press, 1982) illuminates why solitude is experienced as threatening by some people and not others.
Best for: Readers who approach self-understanding analytically and want a structural explanation, not just a phenomenological one.
4. May Sarton — Journal of a Solitude (Norton, 1973)
The novelist and poet May Sarton kept this journal through a particularly difficult year at her house in New Hampshire — a year of creative block, loneliness, conflict with friends, and periodic depression, interspersed with the intense pleasures of gardening, reading, and work. It is not an inspirational book about the glories of chosen aloneness. It is an honest account of what living alone actually feels like over time — the way solitude and loneliness are not always distinguishable in experience, even when the theoretical distinction is clear.
Best for: Those who prefer their reading unresolved and truthful about difficulty.
5. Philip Koch — Solitude: A Philosophical Encounter (Open Court, 1994)
The least-known book on this list and possibly the most rigorous. Koch, a philosopher, argues that solitude is not merely the absence of others but a positive state characterized by a particular kind of self-engagement — what he calls “attunement,” a heightened relation to one’s own experience, to nature, or to creative work.
Koch’s taxonomy (distinguishing solitude from loneliness, privacy, isolation, and alienation) provides a conceptual vocabulary that clarifies what most accounts leave blurry.
Best for: Readers who want to think through the concept before experiencing it.
The next step, in all of these books, is the same: put them down and be alone for a while. The reading is preparation for the encounter, not a substitute for it.