brain

Science and Buddhism VII: Science and Rebirth
Dalai Lama at 2 (Sirensongs)

Buddhism at present diverges from science, in incorporating in its worldview various apparently out-of-body experiences, including the possibility of mental processes unlinking from a dying body, and relinking with a growing embryo — i.e. rebirth. See the formidable investigations of Ian Stevenson.[1]  Most schools discuss a period between death and rebirth known in Tibetan as the Bardo. Are these notions accessible to objective study? There is no need to debar science from the phenomena of the psyche, and even the suggestion of karmic links between one’s willed actions and later events should be, to some extent, testable scientifically.

Rebirth is coherent if the mind is not just physical events.  The mind is certainly very conditioned by the brain and the body.  Consciousness always finds itself in a body, but traditional Buddhism says it might not be a physical body. What would your mind without the vehicle of a physical body be like? It may be unencumbered by the burden of flesh, but it would also be, I guess, lacking in many abilities.  For example, the influence of the senses is quite mysterious.  In the Bardo, one probably can’t do anything to physical things — the body is the interface with a physical world.  One probably can’t think in a linear fashion — no plans, no thinking things out, no deliberate recall etc.  If you are unused to it, you are just swept along in a dreamlike condition — ‘why is all this happening to me?’  Or you are blissed out and thoughtless like the devas.

There isn’t even a persistent entity, a Self, during life, so there is definitely no soul that persists from one life to another.  But yet the Buddhist view is that the karmic processes that you have set in motion during your life don’t simply vanish at the moment when the body becomes a corpse.  Somehow they are still viable; they can germinate and have an influence over another person, newly conceived.  More than an influence — the view is that a foetus growing in its mother’s womb can’t survive without some non-physical contributions from a previous life.  So it’s not you that survives death, yet processes that have built up during your life do go on to have their own consequences in another future life.

This is the Dalai Lama on rebirth.  “The various instances of consciousness… come into being because of the presence of preceding instances of consciousness, and since matter and consciousness have totally different natures, the first moment of consciousness of the new being must be preceded by its substantial cause, which must be a moment of consciousness.  In this way, the existence of the previous life is affirmed.”[2]  Traditionally, rebirth is not seen as an issue of faith, but is something that can be verified through rational inference, according to the Dalai Lama, and I would add the testimony of others, and perhaps personal memory.

In any case, there is no doubt that mental processes influence the physical through karma — and eventually the whole universe will probably be radically affected by the presence in it of self-aware beings.[3]

[1] E.g. Ian Stevenson, Twenty Cases Suggestive of Reincarnation (University press of Virginia, 1974).

[2] The Universe in a Single Atom, 141.

[3] See David Deutsch, The Fabric of Reality (Penguin, 1997).

Science and Buddhism II: Understanding One’s Mind

Scientists themselves have increasingly seen the importance of ‘the observer’.  Science is for human beings, so it needs to understand what it is to be human, what self-awareness is, and what the range of human needs are (scientists tend to stop at the survival (medicine), and material (technology) needs.)  But above all because immediate experience is all we have!  All else is inferred, models, theories, assumptions, attempts at communication etc.

So take mental processes seriously.  And take seriously the mental processes of others — there is a real possibility of empathy.  (Note how primitive Western philosophy and psychology can be here, without ‘contemplative’ disciplines.)

Can consciousness be studied scientifically (i.e. objectively)?  Of course it can.  But one can miss what it actually is — and think that consciousness is a thing, rather than it being ‘actual awareness’ – a ‘light’ you and I are immersed in now, in a rolling present.  The structures that I use to make sense of the ‘contents’ of this illumination (which ‘I’ think of as partly inner, partly outer) can be studied.

Real empathetic communication implies different people’s described worlds can be compared.  One can even construct highly simplified circumstances amenable to careful measurement (experimentation) as in brain imaging, and correlate measured variations with reported mental states, and with observable body responses or actions.

Actual experience and the states of the brain act reciprocally upon one another, so that it is incoherent to say that brain states simply cause mental events.  Perception (says the Buddhist neuroscientist Francisco Varela) can be regarded as subsidiary to the mental function of imagination.  Perception refers to what is present, imagination to what is not present, and the two mix so that in every moment they are emerging into awareness from an unconscious background, as a living present. 

It is still the case that the dominant view among neuroscientists is, in effect, that processes in the body cause the mind.  But neuroscientists such as Varela have shown that one’s state of mind can access local neural processes, so that neither can be reduced to the other.  The mental state corresponds to a particular neural state, and actively incorporates or discards any contemporary neural activity in the relevant brain region, evaluating many potential neural states, “until a single one is transiently stabilised and expressed behaviourally”[1].  Mental states (says Varela) require both a phenomenological and a biological account.  The neural elements and the global cognitive subject are co-determined; the subject is emergent, not just from the brain, but also from preceding mental states.  Buddhism extends this account by offering its pragmatic consequences, showing how the living present, with imagination active, is a means for human transformation. 

[1] Varela and Depraz, in Buddhism and Science: Breaking New Ground, B. Alan Wallace (editor), Columbia University Press, New York, 2003. 213.  See also Varela, Thomson, and Rosch, The Embodied Mind (MIT press, 1993), 22.