personal identity theory Archives

The Western, Buddhist, and Upanishadic Answers to the Problem of the Self

By Dr Neel Burton — Psychiatrist, philosopher, and wine writer; Fellow of Green Templeton College, University of Oxford; author of over twenty books.

Your body and mind have changed enormously in the course of your life, and will continue to change. Yet, convention has you, from the baby to the retiree, as the same person.

But let’s not be so conventional. Let’s take the time to ask: what is a ‘person’, and what would it take for a person no longer to be that same person? Are you the same, identical person at all times? Are you the same person that you were a minute, a day, a year, ten years ago? If so, what is the abiding factor?

The English philosopher John Locke (1632-1704) famously defined a person as ‘a thinking, intelligent being, that has reason and reflection, and can consider itself as itself, the same thinking thing, in different times and places.’ According to this definition, you are a person because you can think about yourself in the past, future, and conditional, and in a variety of different places: ‘Last month I could have won the lottery, if only I had bought a ticket.’

This may tell us what it takes to be a person, but it does not tell us what constitutes the person—or what it is that makes you this self-conscious mental being. Is it your body, your brain, your ‘soul’?

Three Thought Experiments

Imagine, God forbid, that you have a serious accident that leaves you lying brain-dead on a hospital bed. Your body is being kept functioning, but you are no longer self-conscious nor can you ever be again. Are you, in that permanent brain-dead state, still a person? If not, then your physical body cannot be that which makes you a person. And if it is not your physical body, the obvious candidate is your brain or mind.

Some philosophers have argued that you remain the same person because your body or brain remains the same body or brain, in the sense that it is spatiotemporally continuous (continuous in space and time). Others have argued that you remain the same person because you are psychologically continuous, that is, because your later mental states derive or descend from your earlier mental states.

To help decide this problem, the American philosopher Sydney Shoemaker (1931-2022) asked us to imagine that science has advanced to such an extent that brain transplants are now possible. On the same morning, two men, Mr. Brown and Mr. Robinson, each have their brain removed and operated upon. However, a poorly trained assistant inadvertently puts Brown’s brain into Robinson’s head, and Robinson’s brain into Brown’s head. One of these men dies, but the other—say the one with Brown’s brain and Robinson’s body (let’s call him ‘Brownson’)—eventually regains consciousness. When asked his name he replies, ‘Brown.’ Subsequently, he is able to recognise Brown’s wife and family and to relate Brown’s childhood memories, but he cannot recognise Robinson’s wife and family nor relate Robinson’s childhood memories.

Who then is this man Brownson with Brown’s brain and Robinson’s body? If he is Brown, as most people would argue, this would confirm our earlier intuition that a person cannot be reduced to a body. This leaves us with two possibilities: Either Brownson is Brown because he has Brown’s brain, or he is Brown because he is psychologically continuous with Brown.

To decide between these two possibilities, let us push our thought experiment further still. As people can survive with extensive damage to one cerebral hemisphere, let us imagine that Brownson’s brain (or indeed anyone’s brain, say Smith’s) is divided into two hemispheres and that each hemisphere is transplanted into a brainless body. After the operation, two people awake who are both psychologically continuous with Smith, and who have the same character and memories as Smith.

Although both people are psychologically continuous with Smith, they cannot both be Smith—or, by the transitivity of identity, they would also be each other! Moreover, from the moment they awake, their lives and experiences will begin to diverge.

Our attempt to decide between brain and psychological continuity as the seat of personal identity has landed us in an even deeper difficulty: whereas both brain and psychological continuity seem capable of division, personal identity is not.

Parfit and the Pearl of Self

In considering this kind of ‘fission’ thought experiment, the Oxford philosopher Derek Parfit (1942-2017) argued that personal identity may not be what matters.

Because neither of the two people who acquired one of Smith’s brain hemispheres is Smith, Smith cannot be said to have survived the fission of his brain. Yet, everything that matters about Smith—his memories, character, intentions, relations—has survived in both of the transplantees. And it would be absurd to destroy one of the transplantees simply so that we could preserve numerical identity and claim that Smith had survived.

For Parfit, there is no further fact about personal identity, no ‘pearl of self’ that passes intact from one moment, or body, to the next. What matters is not identity but continuity.

This sounds radical. But to me, who has written on Indian philosophy, it rings a bell—or even two.

The Buddhist Take

More than two thousand years before Locke, Shoemaker, and Parfit, the Buddha had argued that what we take to be the self is composed of five elements (skandhas), namely, body, sensation, perception, will, and consciousness. The five skandhas are in a constant state of flux but together create the illusion of integrity and continuity, that is, the illusion of the self.

This explains why, when I try to become aware of myself, I can only ever become aware of such and such perception, such and such sensation, or such and such thought, but never of any actual, core self.

The death of the bodily self leads to the disaggregation of the skandhas and to their re-aggregation into another not-self, which is neither identical to nor entirely different from the previous one, but forms part of a causal continuum with it. An analogy that is often offered to describe this process of rebirth is that of a flame, fuelled by desire, passing from one candle to the next.

The cycle of rebirth can only be broken by transcending our subjective and distorted image of the world, which is built around the ‘I am’ conceit. This, then, is nibbana, or, in Sanskrit rather than Pali, nirvana.

Nirvana, as I see it, rests on the understanding that consciousness is a sequence of conscious moments rather than the continuous, unbroken consciousness of the ‘I am’ conceit. This understanding, so long as it can be maintained, amounts to freedom from the self.

The Upanishadic Take

While Parfit and the Buddha have much in common, the Upanishadic tradition adopts a different approach.

When I look for my self, I find my body, sensation, perception, and so on. The Buddhist concludes that, since none of these is permanent, there can be no permanent self. But the Upanishadic sage might ask: who, or what, is aware of all these things?

The answer of the Upanishads is the Atman, or true Self: not the skandhas, which wax and wane, but the consciousness that is aware of them. Just like the eye cannot see itself, though it sees all else, so this ‘witness consciousness’ cannot observe itself. But through every change, it is the one constant.

Whereas the Buddhist concludes that there is no enduring self, the Upanishadic sage concludes that we have been looking for it in the wrong place. The self is not something that we experience, but that by which we experience. It is not an actor on the stage, but the prince watching from behind the curtain.

Two birds sitting in a tree — The jiva and Atman, sitting in a tree

East and West

We began by asking what, from baby to retiree, makes you the same person. The body could not provide the answer, while brain and psychological continuity proved capable of division. Parfit’s solution was to question the question: beyond continuity, there is no further fact of personal identity.

The Buddhist arrives, by a very different route, at essentially the same conclusion. What we call the self is a succession of changing states and processes, held together by causal continuity and the ‘I am’ conceit. Liberation lies not in finding the self, but in freeing ourselves from it. To ‘know yourself’ is, paradoxically, to know that there is no self to know.

The Upanishadic sage, though acutely aware of the problem, succeeds in salvaging the abiding self. No abiding self can be found among the changeable contents of consciousness, because the true Self is not one of those contents, and not changeable.

All three traditions have noticed that the self cannot be found among the contents of experience. From this, the Western tradition and Buddhism conclude that there is no self. The Hindu tradition preserves the self by distinguishing between the personal self, or jiva, and the universal Self, or Atman. Where the jiva is attached, ever-changing, and mortal, the Atman is detached, steadfast, and immortal, and of a kind with God, or Brahman. The precise relationship between Atman and Brahman is a major theme, and dividing line, in Hindu philosophy.

In the Shvetashvatara Upanishad, the jiva and Atman are compared to two inseparable birds sitting in a tree (the body). One bird, the jiva, gorges on the sweet and bitter fruits of the tree, while the other bird, tasting of neither, calmly looks on.

We can never catch the second bird, because it is the one that is looking. And so it remains forever elusive. But if the Upanishadic vision is correct, to know that bird is to know both ourselves and God, and, as in Buddhism, to transcend the distinction between self and other.

In the West, we tend to look upon the personal self as a problem to be solved; in India, as the key to salvation.