Menu

53 Sermon Illustrations on Brain

53 illustrations Page 2 of 2

The brain in Christian preaching symbolizes the seat of thought, understanding, and spiritual discernment, highlighting the interplay between physical mind and immaterial soul (Romans 12:2). Illustrations often use images of computers, wiring, and mental processes to contrast God's design with materialistic or transhumanist views, emphasizing faith's deep roots in human nature (Isaiah 1:18).

Can Science Explain Heaven?

Can science explain heaven? Scientists try to explain near-death experiences.

________

There are those who believe that science will eventually explain everything — including our enduring belief in heaven. The thesis here is very simple: heaven is not a real place, or even a process or a supernatural event. It’s something that happens in your brain as you die.

I first encountered this idea as I was researching my new book, HEAVEN: OUR ENDURING FASCINATION WITH THE AFTERLIFE. I was having lunch with my friend and colleague Christopher Dickey, who told me that his father, the writer James Dickey, had a fantasy of heaven in which all of his closest friends were sitting around a swimming pool, chatting. “There was nothing special about the pool itself,” wrote Chris in SUMMER OF DELIVERANCE: A MEMOIR OF FATHER AND SON. “Nobody walked on the water. And he never told me who the friends were ... But what he took away from the dream was a sense of contentment, of being at ease with himself and the world, as if he had gotten a preview of heaven. He called that place ‘The Happy Swimming Pool.’” Chris believes that everything we think we know about heaven happens in the moments before death. After that, there’s nothing.

Science cannot definitively proof or disprove Chris’s theory, but some scientists are willing to take guesses. And these guesses are based, in part, on a growing body of research around Near-Death Experience (NDE). According to a 2000 article in THE LANCET, between 9 and 18 percent of people who have been demonstrably near death report having had such an experience. And surveys of NDE accounts show great similarities in the details. People who have had NDEs describe — like some religious visionaries — a tunnel, a light, a gate, or a door, a sense of being out of the body, meeting people they know or have heard about, finding themselves in the presence of God, and then returning, changed.

Andrew Newberg is an associate professor in the radiology department at the University of Pennsylvania who has made his reputation studying the brain scans of religious people (nuns and monks) who have ecstatic experiences as they meditate. He believes the “tunnel” and “light” phenomena can be explained easily. As your eyesight fades, you lose the peripheral areas first, he hypothesizes. “That’s why you’d have a tunnel sensation.” If you see a bright light, that could be the central part of the visual system shutting down last.

Newberg puts forward the following scenario, which, he emphasizes, is guesswork. When people die, two parts of the brain, which usually work in opposition to each other, act cooperatively. The sympathetic nervous system — a web of nerves and neurons running through the spinal cord and spread to virtually every organ in the body — is responsible for arousal and excitement. It gets you ready for action. The parasympathetic system — with which the sympathetic system is entwined — calms you down and rejuvenates you. In life, the turning on of one system prompts the shutting down of the other. The sympathetic nervous system kicks in when a car cuts you off on the highway; the parasympathetic system is in charge as you’re falling asleep. But in the brains of people reporting mystical experiences — and, perhaps, in death — both systems are fully “on,” giving a person the sensation both of slowing down, being “out of body,” and of seeing things vividly, including memories of important people and past events. Does Newberg believe, then, that visions of heaven are merely chemical-neurological events? He laughs nervously. “I don’t know.” He laughs again. “It’s, um ... I don’t think we have enough evidence to say.”

Since at least the 1980s, scientists have theorized that NDEs occur as a kind of physiological self-defense mechanism. In order to guard against damage during trauma, the brain releases protective chemicals that also happen to trigger intense hallucinations. This theory gained traction after scientists realized that virtually all the features of an NDE — a sense of moving through a tunnel, and “out of body” feeling, spiritual awe, visual hallucinations, and intense memories — can be reproduced with a stiff dose of ketamine, a horse tranquilizer frequently used as a party drug. In 2000, a psychiatrist named Karl Jansen wrote a book, KETAMINE: DREAMS AND REALITIES, in which he interviewed a number of recreational users. One of them, who called himself K.U., describes one of his drug trips this way: “I came out into a golden Light. I rose into the Light and found myself having an unspoken interchange with the Light, which I believed to be God.” Dante said it better, but the vision is astonishingly the same.

________

Adapted from the forthcoming book HEAVEN: OUR ENDURING FASCINATION WITH THE AFTERLIFE by Lisa Miller. Copyright ©2010 by Lisa Miller.

from Newsweek · Lisa Miller via Kerux Sermon and Illustration Database visionbrainheaven

Religion and Evolutionary Theory

Religion - what is it good for? Anthropologist Harvey Whitehouse is leading a study on how religious belief fits in with evolutionary theory. [Article takes a purely mechanistic approach to religious faith.]

Can science explain religion? For most of human history, it has been a bad career move to try to rationalize religious belief and behavior. But quite apart from the risks involved in defying the religious majority - wave goodbye to your presidential aspirations, if not your life - there is the puzzling question of whether earthly science has any right or reason to enter the realm of omnipotent gods and eternal souls.

It’s not just committed believers and defensive theologians who resist secular analysis. Even scientific researchers have shied away from investigating religion on its own terms. As Harvard evolutionary theorist Stephen Jay Gould famously put it - using a term redolent of Vatican claims to authority - science and religion belong to “non-overlapping magisteria.”

But lately the great divide has begun to shrink as a more determined band of researchers sets out to explain sacred mysteries by means of what Oxford anthropologist Harvey Whitehouse calls “the new cognitive science of religion.”

For Dr. Whitehouse, who is coordinating a Europe-wide study on the origin and development of religion, the beliefs and behaviors that we choose to call religion are rooted in our evolutionary history. His aim is to find scientific explanations for universal traits of the religious repertoire: belief in the after life, in creator or creators, in supernatural beings; a high regard for the value of signs and portents; extensive use of rituals and exegesis; a system of punishments and rewards; an understanding of moral obligations; a sense of the sacred; an acknowledgment of spirits that can take possession of the body and the brain; an acceptance of divine revelation.

While others might use the insights of evolution to free the world from divine dogma, Dr. Whitehouse and his colleagues are more interested in explaining why religion fits the needs of homo sapiens so well - to the point where it can be considered an essential part of the human condition.

Evolution, in the case of religious development, can be seen to work in two stages. First, biological: Our minds may be set up in a certain adaptive way that gives rise to intuitions and behaviors that come to be called religious. For example, hypersensitivity to threats could have been an early evolutionary advantage, and the ability to perceive a predator in a dark forest could also predispose you to sense a supernatural presence, the prototype of a spirit or a god.

Then there is socio-cultural evolution. The basic mental structure that makes humans predisposed to what we consider the features of religion develops in what Dr. Whitehouse calls “weird and wonderful directions” according to a host of local variables - witchcraft rituals in the Sudan, monastic chanting in Quebec, possession by external spirits in Brazil.

INTUITION OF AN AFTERLIFE

By taking an empirical approach to understanding religion, Dr. Whitehouse says, cognitive scientists have reason to postulate that “humans have a propensity because of our evolutionary history to believe that when you die, that’s not entirely the end of you; or that we have an intuition about how things come to be the way they are, how the physical world is structured and organized; or that there are supernatural beings around who know what we do, particularly in areas that are morally salient in some way, and that they’ll punish or reward us accordingly. And all these intuitions might be natural outcomes of being the kind of species we are, in the same way that a certain kind of song pattern is the natural outcome of being a blackbird.”

It’s easy enough to believe in the universal characteristic of the blackbird’s song, whatever the local variations, but how can one assume that a belief in supernatural beings is a basic component of humans - especially given the 21st-century outbreak of militant atheism on the bestseller lists and the YouTube lecture circuit?

Harvey Whitehouse works at the same university as Richard Dawkins, an evolutionary biologist and vocal atheist, and their research groups have what you might call overlapping magisteria. But while the two men are both analyzing religion in evolutionary terms, they have reached different conclusions about human propensities toward belief.

“Dawkins proceeds from the assumption that you can beat any old religion into your kids if you put enough energy into it,” Dr. Whitehouse says. “But we think kids have some pretty strong inclinations, and you can only get them to believe stuff that accords with their natural biases. ... Kids are much more inclined in general to believe stories of a creationist kind, irrespective of what their parents believe, and this is true even of atheists’ kids.”

In experiments where children are shown pictures of pointy rocks, he says, “kids will always prefer explanations like it’s pointy because it doesn’t want elephants sitting on it as opposed to it’s pointy because it’s been worn away by rains over thousands of years.” That is considered a creationist response, and interestingly, Dr. Whitehouse notes, “old people, particularly as they become senile, are more susceptible to that kind of belief.”

The religious brain is susceptible to a number of similar variants. Women, in particular, seem to have a bent toward being possessed by spirits in societies where that is a defining part of religious practice, often as a healing ritual. Western cultures largely resist this component - apart from some speaking in tongues, for example - or the role of a medium in quasi-religious séances and spirit-raising.

But for scientists of religion, the emphasis on spirit possession in Afro-Brazilian cults is a thing of fascination - it involves wrangling several mental presences together at the same time, in the same place, putting great demands on the part of the brain that infers the mental states of oneself and others. And it seems that women are more highly developed than men at making such inferences.

BODIES, MINDS AND SPIRITS

Spirit possession may seem a remote concept to practitioners in the Judeo-Christian tradition, whose cultural predisposition lies toward polite weekly rituals based on codified texts given the stamp of approval by ordained leaders. Yet, for Dr. Whitehouse and his colleagues, spirit possession is part of the common package of human religious traits that take different forms in different surroundings.

Our ready acceptance of a mind-body dualism proceeds from the same mental starting point, “byproducts of how we make sense of the world,” according to Yale psychologist Paul Bloom. Our thoughts appear to us to exist separate from our fleshy bits, which fits with a religious world view of souls disconnected from bodies, and the continued existence of loved ones after death. Even otherwise non-religious people, researchers have discovered, are prone to share the belief that something exists beyond the mere body, whether we refer to it as a soul, a spirit or just a vague psychic something.

This doesn’t in itself bring God or gods into play. Yet apart from Buddhism in its most strictly defined state, it is rare to come across a religious belief system that does not stress the dominant role of a supernatural power - for most of us, a divine presence is the basic component of religion, hence the word atheist (from the Greek for “without God”) for religion-deniers. This is the basic material of most theological study, but for cognitive scientists, the Supreme Being per se isn’t much of a player - University of Toronto religion professor Donald Wiebe refers to their approach to belief as “methodologically atheist” and jokes that religion’s more empirically focused researchers “don’t talk about God, they talk about god-talk.”

Instead, much of the cognitive research into the role of God in human life often comes down to what might be called the Big Brother Is Watching You effect - such as the work by University of British Columbia researchers Ara Norenzayan and Azim Shariff, which has showed how subjects who had been primed by researchers to think of words like God and spirit were more willing to share money with others.

On the face of it, that may not seem to be personally (and therefore evolutionarily) advantageous compared with the laboratory version of the godless secular position, where the reward money is yours and yours alone. But the success of religions in the long run, as Dr. Whitehouse points out, come from their ability to create and maintain coalitions. Call it altruism, call it fear, call it faith - but if your thoughts of God help to enhance your group’s long-term survival, you will benefit in the end.

________

John Allemang is a Globe and Mail feature writer.

Decoding the Mystery of Near-Death Experiences

We’ve all heard the stories about near-death experiences: the tunnel, the white light, the encounter with long-dead relatives now looking very much alive.

Scientists have cast a skeptical eye on these accounts. They say that these feelings and visions are simply the result of a brain shutting down.

But now some researchers are giving a closer neurological look at near-death experiences and asking: Can your mind operate when your brain has stopped?

‘I POPPED UP OUT THE TOP OF MY HEAD’

I met Pam Reynolds in her tour bus. She’s a big deal in the music world — her company, Southern Tracks, has recorded music by everyone from Bruce Springsteen to Pearl Jam to REM. But you’ve probably never heard her favorite song. It’s the one Reynolds wrote about the time she traveled to death’s door and back. The experience has made her something of a rock star in the near-death world. Believers say she is proof positive that the mind can operate when the brain is stilled. Nonbelievers say she’s nothing of the sort.

Reynolds’ journey began one hot August day in 1991.

“I was in Virginia Beach, Virginia, with my husband,” she recalls. “We were promoting a new record. And I inexplicably forgot how to talk. I’ve got a big mouth. I never forget how to talk.”

An MRI revealed an aneurysm on her brain stem. It was already leaking, a ticking time bomb. Her doctor in Atlanta said her best hope was a young brain surgeon at the Barrow Neurological Institute in Arizona named Robert Spetzler.

“The aneurysm was very large, which meant the risk of rupture was also very large,” Spetzler says. “And it was in a location where the only way to really give her the very best odds of fixing it required what we call ‘cardiac standstill.’”

It was a daring operation: Chilling her body, draining the blood out of her head like oil from a car engine, snipping the aneurysm and then bringing her back from the edge of death.

“She is as deeply comatose as you can be and still be alive,” Spetzler observes.

When the operation began, the surgeons taped shut Reynolds’ eyes and put molded speakers in her ears. The ear speakers, which made clicking sounds as loud as a jet plane taking off, allowed the surgeons to measure her brain stem activity and let them know when they could drain her blood.

“I was lying there on the gurney minding my own business, seriously unconscious, when I started to hear a noise,” Reynolds recalls. “It was a natural D, and as the sound continued — I don’t know how to explain this, other than to go ahead and say it — I popped up out the top of my head.”

A TUNNEL AND BRIGHT LIGHT

She says she found herself looking down at the operating table. She says she could see 20 people around the table and hear what sounded like a dentist’s drill. She looked at the instrument in the surgeon’s hand.

“It was an odd-looking thing,” she says. “It looked like the handle on my electric toothbrush.”

Reynolds observed the Midas Rex bone saw the surgeons used to cut open her head, the drill bits, and the case, which looked like the one where her father kept his socket wrenches. Then she noticed a surgeon at her left groin.

“I heard a female voice say, ‘Her arteries are too small.’ And Dr. Spetzler — I think it was him — said, ‘Use the other side,’” Reynolds says.

Soon after, the surgeons began to lower her body temperature to 60 degrees. It was about that time that Reynolds believes she noticed a tunnel and bright light. She eventually flat-lined completely, and the surgeons drained the blood out of her head.

During her near-death experience, she says she chatted with her dead grandmother and uncle, who escorted her back to the operating room. She says as they looked down on her body, she could hear the Eagles’ song “Hotel California” playing in the operating room as the doctors restarted her heart. She says her body looked like a train wreck, and she said she didn’t want to return.

“My uncle pushed me,” she says, laughing. “And when I hit the body, the line in the song was, ‘You can check out anytime you like, but you can never leave.’ And I opened my eyes and I said, ‘You know, that is really insensitive!’”

A VISION THAT MATCHES THE RECORD

Afterwards, Reynolds assumed she had been hallucinating. But a year later, she mentioned the details to her neurosurgeon. Spetzler says her account matched his memory.

“From a scientific perspective,” he says, “I have absolutely no explanation about how it could have happened.”

Spetzler did not check out all the details, but Michael Sabom did. Sabom is a cardiologist in Atlanta who was researching near-death experiences.

“With Pam’s permission, they sent me her records from the surgery,” he says. “And long story short, what she said happened to her is actually what Spetzler did with her out in Arizona.”

According to the records, there were 20 doctors in the room. There was a conversation about the veins in her left leg. She was defibrillated. They were playing “Hotel California.” How about that bone saw? Sabom got a photo from the manufacturer — and it does look like an electric toothbrush.

How, Sabom wonders, could she know these things?

“She could not have heard [it], because of what they did to her ears,” he says. “In addition, both of her eyes were taped shut, so she couldn’t open her eyes and see what was going on. So her physical sensory perception was off the table.”

AN ALTERNATIVE EXPLANATION?

That’s preposterous, says anesthesiologist Gerald Woerlee.

“This report provides absolutely no evidence for survival of any sort of consciousness outside the body during near-death experiences or any other such experiences,” he says.

Woerlee, an Australian researcher and near-death experience debunker who has investigated Reynolds’ case, says what happened to her is easy to explain. He says when they cut into her head, she was jolted into consciousness. At that point, they had not yet drained blood from her brain. He believes she could hear — despite the clicking earplugs.

“There are various explanations,” Woerlee says. “One: that the earphones or plugs were not that tightly fitting. Two: It could have been that it was due to sound transmission through the operating table itself.”

So Reynolds could have heard conversations. As for seeing the Midas Rex bone saw, he says, she recognized a sound from her childhood.

“She made a picture in her mind of a machine or a device which was very similar to what she was familiar with — a dental drill,” Woerlee says.

Woerlee says Reynolds experienced anesthesia awareness, in which a person is conscious but can’t move. He figures back in 1991, that happened in 1 out of every 2,000 operations.

That doesn’t convince cardiologist Sabom or neurosurgeon Spetzler. They believe the combination of anesthesia and the sluggish brain activity caused by hypothermia meant that Reynolds could not form or retain memories for a significant part of the operation. At the very least, Sabom says, Reynolds’ story raises the possibility that consciousness can function even when the brain is offline.

“Is there some type of awareness that occurs from a nonfunctional, physical brain?” Sabom asks. “And if there is, does that mean that there’s a soul or spirit?”

RE-CREATING NEAR-DEATH EXPERIENCES

In the end, Reynolds’ story is just an anecdote. And in fact, that’s the problem with all the studies of near-death experiences. After all, you can’t do clinical trials where you kill Mrs. Smith and tag along as she passes through the tunnel to the light, just to verify her story.

Except in Hollywood, of course. In the 1990 movie FLATLINERS (starring Julia Roberts and Kiefer Sutherland), five medical students try to peer into the next world by stopping their hearts and returning to tell the tale.

The movie inspired Mario Beauregard, a neuroscientist at the University of Montreal. What if he could do the next best thing? Since stopping people’s hearts is a research no-no, he is asking people who have had near-death experiences to relive them while he looks to see what’s happening in their head.

“And it seems that these people have a different sort of brain,” Beauregard says in his soft French accent. “It’s like there’s a shift in their brain, and this shift will allow these people to stay in touch with the spiritual world more easily, on a daily basis.”

Beauregard recruited 15 people who had a near-death experience. One of those was Gilles Bedard. In 1973, Bedard’s heart stopped, and in the moments before he was resuscitated, he was greeted by what he describes as 12 beings of light.

“And I felt it was like the breath of the universe. Because it was like...” he says as he blows out his breath, slowly, like a low wind, “very, very peaceful.”

Since then, Bedard has meditated every day, and he says he often reconnects with the light. The research question is, how will his brain respond when he does?

A PERMANENT CHANGE IN BRAIN ACTIVITY?

For the experiment, Bedard is shut into an isolation chamber at Beauregard’s Montreal lab. Bedard’s head sprouts 32 electrodes, which will record his brain wave activity. He’s told to relax for a few moments. Then he’ll be instructed to imagine his near-death experience.

A few minutes later, Beauregard and his research assistant are peering at a computer screen recording Bedard’s brain waves. They cluck happily at the slow, large-amplitude Delta waves undulating across the screen — typical of a person in deep meditation or deep sleep.

Afterward, the researcher asks Bedard if he was able to connect with the light.

“Yeah, it was coming from within,” he says. “It was loving, intelligent ... very powerful.”

It would take Beauregard a year to complete his research on near-death experiences. A few weeks ago, I called to ask him what he had found.

“It’s like the near-death experience triggered something at a neural level in the brain,” he said. “And perhaps this change, in terms of brain activity, is sort of permanent.”

Beauregard says it’s as if touching death jump-started the spiritual lives of these people. Their brains in the spiritual state look a lot like those of Catholic nuns and Buddhist monks who have spent tens of thousands of hours in prayer and meditation. Both groups showed extremely slow brain wave activity.

The researchers also saw significant changes in brain regions associated with positive emotions, attention and personal boundaries, as subjects who had had near-death experiences lost their sense of their physical bodies and merged with God or the “light.”

BRAIN CHEMISTRY OR A TRIP TO HEAVEN?

Skeptic Woerlee says there’s nothing remarkable — and certainly nothing spiritual — about these findings.

“The brain function of many of these people who have undergone a near-death experience is altered,” Woerlee says. “That’s correct. It is altered. Extreme oxygen starvation does change brain function — because it causes brain damage to the larger cells in the brain.”

It’s brain chemistry, he says, not a trip to heaven.

In other words, Woerlee and Beauregard looked at the same images and came to opposite conclusions.

I found that dichotomy everywhere as I interviewed experts about the emerging science of spirituality. It’s kind of like a Rorschach test: Some researchers look at the data and say spiritual experience is only an electrical storm in the temporal lobe, or a brain gasping for oxygen — all fully explainable by science. Others say our brains are reflecting an encounter with the divine.

And almost invariably, where a scientist stands on that issue has little to do with the clinical findings of any study. It has almost everything to do with the scientist’s personal beliefs.

from www.npr.org; All Things Considered · Barbara Bradley Hagerty via Kerux Sermon and Illustration Database spiritualitybrainscience

Everything we make is available for free because of a generous community of supporters.

Donate