What Is the Self According to Different Philosophical Traditions?

Quick Answer

The self is understood radically differently across major philosophical traditions. Buddhist philosophy, through the doctrine of anatta, challenges the very notion of a permanent, independent self. Greek thought, particularly in Plato, locates the self in the rational soul — an immortal essence that transcends the body. Modern philosophy complicates the picture further, bringing questions of consciousness, narrative identity, and the constructed nature of selfhood to the foreground. There is no single answer; instead, the question of the self reveals deep divisions about what it means to be a person.

Definition

What we call the self is the sense of being a distinct, continuous entity — the "I" that thinks, feels, remembers, and acts. In philosophical terms, the self is the subject of experience and the bearer of identity over time. It is what makes a person the same person from childhood through old age, and what distinguishes one person from another. Yet defining the self precisely has proven extraordinarily difficult. Every attempt to pin it down seems to generate further questions: Is the self a substance, a process, a narrative, or an illusion? Is it found in consciousness, in memory, in the body, in social relationships, or in some combination of these? The difficulty of answering these questions has made the self one of philosophy's most enduring and contested topics.

Historical Perspectives

The question of the self takes different forms in different philosophical traditions, and these differences are not merely academic — they reflect fundamentally different ways of understanding what it means to be human.

Buddhist Philosophy: The Doctrine of No-Self

In the Buddhist tradition, the self is not a thing to be discovered but a fiction to be seen through. The doctrine of anatta — literally "not-self" — holds that what we call the self is merely a conventional designation for a constantly changing bundle of five aggregates: form, sensation, perception, mental formations, and consciousness. The Buddha's argument in the Anattalakkhana Sutta is remarkably direct: examine each of these aggregates and ask whether it is permanent or impermanent, subject to control or beyond control. Finding each aggregate impermanent and beyond full control, the Buddha concludes that none of them can properly be called "self" — for what kind of self would be impermanent and not subject to one's own will?

This is not a nihilistic claim. The point is not that nothing exists but that nothing exists in the way we ordinarily assume — as a permanent, independent, self-sufficient entity. The self is a process, a flowing stream of causally connected mental and physical events. Clinging to the idea of a permanent self is, in the Buddhist analysis, the root of suffering. Liberation comes not from finding the self but from understanding its constructed nature.

Greek Philosophy: The Rational Soul

The Greek philosophical tradition offers a dramatically different picture. For Plato, the self is essentially the rational soul — an immortal, immaterial substance temporarily housed in a body. In the Phaedo and the Republic, Plato argues that the soul is the true person, the body merely its instrument. The soul has three parts — reason, spirit, and appetite — and the well-ordered self is one in which reason governs the other two. This tripartite model connects the question of the self directly to the question of how to live: knowing the self means knowing what properly governs it.

Aristotle, while rejecting Plato's theory of separately existing Forms, retains the idea that the self is fundamentally defined by the rational soul. For Aristotle, the soul is the form of the body — not a separate substance but the organizing principle that makes a living body what it is. The human self is distinguished by the capacity for rational activity, and the good life consists in exercising this capacity well over a complete life.

Modern Philosophy: Consciousness and Identity

Modern philosophy brings the question of the self into sharper focus through the problem of personal identity. John Locke argued that personal identity consists in continuity of consciousness and memory — you are the same person as your younger self because you can remember being that person. David Hume took a more radical position, arguing that when he introspected, he found no self at all — only a bundle of perceptions succeeding one another with inconceivable rapidity. This "bundle theory" of the self echoes Buddhist insights while arriving at them through a different route. Immanuel Kant responded by arguing that the self must be a transcendental unity — not an object of experience but the condition that makes unified experience possible.

Major Thinkers

The Buddha, through the doctrine of anatta, offered one of the most radical and influential accounts of the self in world philosophy. His approach is not metaphysical but therapeutic — the point is not to describe the self but to release the suffering caused by clinging to it. Plato located the self in the rational soul, making self-knowledge the foundation of the philosophical life. Socrates, as presented by Plato, made the injunction "know thyself" the center of his philosophical practice, though he understood this knowing as a form of recognition of one's own limits. Descartes, with his famous cogito — "I think, therefore I am" — made the thinking self the indubitable foundation of knowledge. Hume, by contrast, treated the self as a fiction produced by the imagination. Kant made the self a transcendental condition of experience. In the twentieth century, Derek Parfit revitalized the debate by arguing that personal identity is not what matters — what matters is psychological continuity, regardless of whether it constitutes identity in the strict sense.

Different Views

The genuine disagreements about the self run deep. The most fundamental divide concerns whether the self is a substance — something that exists independently and persists through change — or a process — something that is constituted by change and has no independent existence. Buddhist philosophy and Humean empiricism represent the process view; Platonic and Cartesian philosophy represent the substance view. A related disagreement concerns whether the self is discovered or constructed. The Buddhist tradition suggests that what we call the self is constructed through ignorance and craving; narrative theories of identity, developed by thinkers like Paul Ricoeur and Charles Taylor, suggest that the self is constructed through the stories we tell about our lives. Still another disagreement concerns whether the self is essentially individual or essentially relational. Confucian thought, for instance, understands the self as constituted through relationships — a person is a son, a father, a friend, a subject — rather than as an isolated individual.

Modern Understanding

Contemporary philosophy of self draws on multiple disciplines. Neuroscience raises questions about whether the self is an illusion generated by brain processes. Psychology explores how the sense of self develops in childhood and how it can fragment in conditions like dissociative identity disorder. Narrative theory examines how we construct and maintain a coherent sense of identity through storytelling. The Buddhist tradition has found new audiences through the mindfulness movement, which adapts the insight of no-self into a practical discipline for reducing suffering. The question of the self has also become central to debates about artificial intelligence: if a machine could exhibit all the behavioral markers of selfhood, would it have a self? These contemporary discussions reveal that the ancient question of the self remains as urgent as ever.

Practical Meaning

How we understand the self has profound consequences for how we live. If the self is a permanent substance, then the project of self-improvement is about discovering and actualizing what we already essentially are. If the self is a process, then change is not a threat to identity but its very nature. If the self is a narrative, then the stories we tell about ourselves matter enormously — they are not just descriptions but constitutions of who we are. The Buddhist insight that the self is not a fixed entity but a flowing process can be liberating: it means that we are not trapped by who we have been, that transformation is possible at every moment. At the same time, the sense of self as a continuous, responsible agent is essential for moral life — we hold people accountable for actions precisely because we understand them as the same self who performed them. The tension between these perspectives is not a problem to be solved but a condition to be navigated.

Common Questions

Is the Buddhist doctrine of no-self compatible with moral responsibility? Buddhist philosophy addresses this by distinguishing between conventional truth — the level at which we speak of persons and responsibility — and ultimate truth — the level at which no permanent self can be found. Moral responsibility operates at the conventional level and is not undermined by the ultimate insight.

If the self is a process, what makes me the same person over time? Psychological continuity — the overlapping chains of memory, character, and concern that connect my present self to my past and future selves — provides a kind of continuity that is not identity in the strict sense but is sufficient for what matters in personal survival.

Does modern neuroscience show that the self is an illusion? Neuroscience shows that the sense of self is constructed by brain processes, but whether this means the self is an illusion depends on what we mean by "illusion." If we mean that the self is not a simple, indivisible substance, then neuroscience supports this conclusion. But the self may be real as a process even if it is not a substance.

What is the relationship between the self and consciousness? Consciousness is the medium in which the self appears, but whether consciousness requires a self is disputed. Some traditions argue that consciousness can exist without a self — that the sense of being a separate self is an additional layer added to bare awareness.

Related Knowledge

• What Is Identity?
• What Is Reality?
• What Is Knowledge?
• What Is Consciousness?
• Buddha
• Plato
• Socrates
• Buddhism
• Greek Philosophy
• The Dhammapada
• The Republic

Sources

1. The Dhammapada, Anonymous (Buddhist tradition), Access to Insight
2. Republic, Plato, MIT Classics
3. Anattalakkhana Sutta, Buddha (recorded by disciples), Access to Insight