A Theory of Soul Consistent with Scripture and Neuroscience - Part 2: Initial Explanatory Features

             As mentioned in the first entry of this series [here], my goal with this series of entries is to present a theory of the soul that is consistent with both the Bible and current scientific understanding about the brain and how it functions.  In this entry, I want to lay out the specific features related to the soul, consciousness, and free will that I intend to incorporate in my theory.  As I present the theory in future entries, I hope to demonstrate how my proposed theory addresses each of the following features.

             I've listed below the key explanatory features of my theory of the soul.  I divided them up into four categories:  1) Christian Doctrine/Teaching; 2) Established Scientific Observations; 3) Explanatory Gaps in Scientific Understanding; and 4) Explanatory Gaps in Dualism.  I think the first two categories are pretty self-explanatory, though I want to clarify that I am using the terms "doctrine/teaching" and "established observation" loosely.  At this point, I'm not going to spend much effort sorting through whether some issue is a true point of Christian doctrine, and I'm not going to spend much effort arguing the validity of certain scientific observations.  In these two categories, I'm just putting forward what I see as the key things that both Christians and Scientists would want to see explained in a theory of the soul.

             The third and fourth categories are the issues that I see as being unexplained by any group with respect to issues of consciousness and free will.  I feel that for my theory to be useful, it needs to address these gaps and provide some explanatory power.  I think it will make sense when you see the topics I've listed under those categories.

             So, here is my initial list of "Key Explanatory Features" of my theory of the soul.

 

Christian Doctrine/Teaching

1.      Moral responsibility of human beings and the existence of sin.

2.     Continuity of the individual for eternity.  Christian teaching is based on the idea of "self-continuity" into the future.  You will remain you - a unique individual - forever.

3.     Death and bodily resurrection.  The resurrected body is a "new body", but it is still a body.

4.     Flesh/soul/spirit composition of human beings [see previous discussion here].

5.      Uniqueness of humans in God's image [I relate this to #8 below].

6.     Indwelling of human beings by the Holy Spirit.

7.      Possibility of evil spirits affecting an individual's actions.

8.     Human beings have souls unique to any other material (living or non-living) thing [see previous discussion here].

 

Established Scientific Observations

1.      Brain anatomy and even physiology is pretty well understood.  The brain is composed of neurons and glial cells (plus blood vessels, etc.).  There is extensive interconnectivity of the neurons in the brain, but the brain is also organized in different regions with specialized functions.  These anatomical regions are fairly consistent from person to person though brains are not carbon copies of each other.  Neuronal connections can be weakened or strengthened through a variety of internal and external factors.

2.     No "soul" has been measured, detected, or observed in the study of the brain.

3.     There is no "free will" center evident in the anatomical exploration of the brain.

4.     The brain is composed of networks of neurons with measurable input-output properties.

5.      Nerve conduction (signal transmission) is an electrochemical process that is very well understood.  Nerve signal transmission is clearly observable as a traveling electrical wave. 

6.     Signal transmission across synapses is well understood although there is "noise" in the transmission signal.  This transmission is primarily chemical in nature.

7.      Actions can be learned.  Repetition of actions/thoughts/etc. results in a strengthening of neuronal connections - the Hebbian plasticity principle that "neurons that fire together, wire together".

8.     There is no evidence that neurons make "decisions" - they just respond to their inputs.  The transmission of signals seems fully explained by the concept of cause and effect.

9.     Brain damage can have a huge effect on how people function and can even change their personality and thinking processes.

10.  Under certain specific types of brain damage, such as cutting the corpus callosum ("split brain"), people seem to exhibit features of two "persons" in one.

11.   People can be "locked-in", meaning that they are unable to respond in any observable way except that their brain is active and, in some cases, seems to still respond to outside inputs.

12.   In cases of brain damage, it is sometimes possible to train other parts of the brain to take over the damaged function, at least to some extent.

13.   Human beings can be placed in an unconscious state via anesthesia or trauma.  If they recover from that state, they have no awareness of being unconscious.

14.   A lot of things that happen in the nervous system happen unconsciously.  The autonomic nervous system, for example, generally operates completely unconsciously.

15.   You are not conscious when you are sleeping; except you dream, which seems different than consciousness when fully awake, but also different than regular sleep.

16.   There are "neural correlates of consciousness" - meaning that some parts of the brain seem necessary for certain aspects of consciousness.

17.   "Libet-style" experiments seem to show that our brain makes decisions before we are conscious of the decision, seemingly indicating that we do not have free will like we think we do [see some previous discussions here and here].

 

Explanatory "Gaps" in Scientific Understanding (Note:  I don't think all of these are really "gaps" - I think they are fundamentally unsolvable from a materialistic perspective.)

1.      Free will.  Humans seem to have free will - we all feel like we do - but there is no plausible mechanism for free will found in the brain.  [For a more general discussion of free will, start here.]

2.     Neural binding problem.  Human consciousness seems to reflect a unity (we see/hear/feel/etc. events as all happening together), but there is no anatomical structure that has any of the features necessary to make this happen.  [See an earlier discussion of this here.]

3.     Qualia.  The fact that there is a subjective component of our sense of things around us, but brains are not made up of those subjective components (i.e. there's nothing "blue" or "pointy" or "cold" in the brain).

 

Explanatory Gaps in Dualism (Note:  these gaps are introduced by dualism, and since I am clearly a dualist, I have to deal with them.)

1.      How and where can a spiritual soul connect to a material brain?

2.     If the spiritual soul induces action, it will violate the laws of physics.  Conservation of energy will be lost.  There will be an effect without a cause. 

3.     If the operation of the brain can be fully explained from a materialistic point of view, then why is it necessary to hypothesize the existence of a soul?  (I discussed this in the first entry [here], but I will probably need to deal with this issue in more depth in the future.)

 

 

             That's my starting list.  Now that I see the whole list together, it seems rather daunting!  Also, I will probably have to update this list and add to it as time goes on.  Please send me comments if you think there are additional points that any theory of the soul needs to address or explain. 

             In the upcoming entries, I want to establish some general concepts about the soul that are think are frequently misunderstood.  It will take a while to lay the groundwork before we dive into the real details!

 

A Theory of Soul Consistent with Scripture and Neuroscience - Part I: The Caveat

             My goal with this series of entries is to present a theory of the soul that is consistent with both the Bible and current scientific understanding of the brain and how it functions.  This theory will, of course, be limited to my own understanding and interpretation of the Bible on this topic, much of which I have discussed in an earlier series of entries on the use of the terms for body, soul, and spirit in the Bible [see here].  Also, the theory will be limited to my own understanding of the current state of brain science and is likely to need modification as I understand more of the science and as more discoveries are made. 

             In this first entry, I'm going to start with a major point of clarification:  what I hope to explore and describe in the entries that follow is a theory of the soul that is useful for Christian thought and maybe even "Christian experimentation".  The theory I describe is not intended to be put forth as a "better explanation" of neuroscientific findings about the brain and mind, but it is expected to be consistent with neuroscientific findings.  As I see it, neuroscience lives in the material realm and therefore is going to pursue theories that arise from within the material realm.  In Christian teaching, the soul is fundamentally non-material, and thus is generally outside of the materially-based scientific exploration.   Given this, I really don't expect non-Christian neuroscientists (or anyone else who is not a Christian) to find my theories that compelling except for one key point:  I hope that everyone can see that there is a rational argument for how the soul might work as it straddles the material and spiritual worlds.  I don't expect non-Christians to adopt my theory and bring the idea of a non-material soul back into their thinking about the mind.  No, I fully expect neuroscience to continue to reject the idea of a soul and keep seeking for material explanations.  Of course, if you've read many of my entries, you would not be surprised to know that I think that philosophical materialism is a completely misguided concept, but that is a totally different topic for discussion [for example, join Lucas for lunch]!

             So why even hypothesize the existence of the soul if there is (or is anticipated to be) a completely materialistic explanation for the mind-brain-soul problem that does not refer to anything that could typically be called the "soul"?  My reason for creating the entries that follow is this:  for Christians, the existence of the soul is revealed[1], not discovered.  As I have discussed elsewhere [here], the existence of the soul is clearly presented in scripture and is a fundamental part of Christian beliefs.  It is a "given" as far as Christian belief goes.  This situation could be a major problem for Christianity because if neuroscience could prove that the soul definitely does not exist, that would negate a basic Christian belief.  Thus, my goal in these entries is to show that, given an appropriate theory of the soul and its features, the belief in the soul is rational and reasonable.  The Christian faith needs to be rational, in my opinion, and so this is an important issue to consider [see here for a further discussion of that point].

             Full-blooded materialists in neuroscience may exclaim:  "the soul is superfluous - we can explain everything through the material properties of the brain."  Therefore, the neuroscience materialist has rejected the idea of a non-material soul because it is an unnecessary extra invention that they are convinced they don't need.  That is fine for those who live in the drab, purposeless materialistic world.  I am not arguing against that line of thinking here, although I will point out that present neuroscience does not explain everything, so there are still gaps (no, not just gaps: huge canyons!) in the materialistic explanation.  But my point is that even if all of those gaps could be closed and neuroscience really can explain every observation of the mind/consciousness/free will/etc. through purely materialistic means, that will not prove there is no soul and will not negate the need for Christians to have a rational theory of the soul and to persist in believing that there is a soul.  For Christians who believe that the Bible is the Word of God and reveals things that could not otherwise be known, the question is not "is the existence of a soul necessary?" but "can the Bible be trusted?" 

             For Christians, the idea of a human soul will never be superfluous.  The need for the soul is bound up in issues of human sin and future judgement.  The need for the soul is bound up in the idea of eternal life.  The need for the soul is bound up in the idea of being indwelt by the Holy Spirit.  These are not points of consideration for neuroscience, and thus to neuroscience the soul seems superfluous.  It is not.

             [On toPart 2...]

 

 

---

[1] By "revealed" I mean that Christians are told about the concept (in this case the "soul") in the Bible.

Christian Apologetics and Its Goals

             [Note:  This entry is written for Christians.  Not that anyone else can't read it, but I'm not sure it will mean a whole lot outside of the Christian faith.]

 

             In my opinion, trying to "prove" Christianity through science is a challenging endeavor that is not worth the effort.  It's like visiting your neighbors to the east of you by travelling west.  Yes, you might eventually get to your next door neighbor's house that way, but why?

 

             Christian apologetics, in my mind, should have the goal of showing that Christian beliefs are reasonable and logical within the new scientific findings of the day.  This is extremely helpful and important for Christians, because they need to know and be assured that their faith is on solid ground.  It can be useful in talking with those who do not believe, because a major roadblock to belief can be the sense that Christianity is illogical and primitive.  But, in general, I just don't see it being a great pathway to belief these days.  There are shorter paths.

 

             Let me illustrate what I mean with an example.  Specifically, the effort to prove that God is the creator of the universe.  There is a lot of apologetic work towards fitting Christian belief into what science has discovered, or at least theorizes, about the origin of the universe and the origin of life on this planet.  Or, alternatively, a lot of apologetic work trying to expose the weaknesses of some of the scientific theories.  This is, in general, good and valuable work, and worthwhile for Christians to engage in.  But what is the goal?  I feel like the (often unstated) goal is this:  to prove that science is wrong.  In fact, it seems that the goal is to prove science wrong to such a compelling extent that scientists will be drawn to abandon their scientific beliefs and turn to Christianity.  I believe that many Christians expect that the arguments being mounted by Christian apologists are so air-tight that everyone should become Christians based on the sheer force of these arguments alone.  In my opinion, this is a misguided view because:  1) the arguments aren't that convincing (i.e. there are always counter-arguments to the counter-arguments), and 2) the arguments don't achieve what we hope to achieve (e.g. convincing someone that the eye is too complex to have evolved randomly is a long way from solus Christus).

 

             This does not mean that such apologetic work is a waste of time.  Far from it.  But the focus should be on helping Christians to see that their faith is reasonable and that they don't need to worry about whether science has discovered some new thing that voids basic Christian beliefs.  It is important to show that Christian faith is reasonable, as I have discussed elsewhere [here].

 

             However, when it comes to trying to help people who do not believe, I think Christians should be more direct.  To be a Christian means to be a follower of Jesus Christ.  It means to believe that Jesus Christ existed and still exists today.  It means to believe that Jesus Christ was God and is still God today.  It means to believe that His death paid the penalty that was due from each one of us personally.  It means that we believe in Jesus Christ so strongly that we commit to doing whatever He commands us to do.  It's all about Jesus.

 

             So, what's the most direct way to Christian belief?  To meet Jesus in a personal and convincing way.  That's as direct as it gets.  How does that happen?  Well, if you believe as I do, that Jesus is constantly seeking every person and trying to draw that person towards belief, then the direct route is to try to remove whatever blinders there may be that prevents[1] Jesus from getting through to them.  What are the blinders that people have?  When it comes to the academic world, the biggest blinder, by far, is the complete rejection of the miraculous.  This is the means by which God can communicate with the unbeliever (and believer too, for that matter).  Christian belief has, at its very core, the miraculous resurrection of Jesus Christ.  Without the miraculous, there is no Christianity.  Thus, when a person rejects any possibility of the miraculous, there are no remaining options by which Jesus can get their attention.  Each individual needs to experience Jesus in some personal way.  If their eyes are shut to His work and their ears are closed to His voice, then our only avenue to help them believe is this:  try to get them to open their eyes and ears!  Everything else is just wasted effort.

 

             It is true that sometimes a big roadblock for belief in Christianity is the general idea that Christian belief is illogical and/or primitive and that science has shown that Christianity is demonstrably false.  This roadblock should be addressed, but only addressed with the following goal:  to show that Christian beliefs are rational and could be true.  We don't need to show that they are, in fact, true.  Once you personally encounter Jesus and realize that He really is alive and really is God, everything else will come into focus and become clear. 

 

             Why not take the direct route?  See Jesus at work.  Hear Jesus.  To try to take the route that passes through the path of:  "you can't rule out a God" to "there must be a God" to "God is the creator" to "the Bible is true" to "Jesus was a real person" to....it just seems to me to be a really really long road to take when Jesus is already standing right next to the person and trying to get his or her attention! 

---

[1] I know it seems weird to suggest that human beings can prevent God from interacting with them (isn't God all-powerful?), but God chooses to allow people to persist in their unbelief if that is what they choose.  He doesn't force belief.