Article

Awe and wonder

Comment

7 September 2023

6 min read

The heart of the matter

Heart doctor Michael Henein steps back to consider the unseen and unique wonders of the human body’s design.

Michael Henein

Professor Michael Henein is a consultant cardiologist, and a Professor of Cardiology at Umea University, Sweden.

A model of a human heart on a short stand.

Photo by Jesse Orrico on Unsplash.

Shakespeare famously asked:

“What a piece of work is a man, how noble in reason, how
infinite in faculties, in form and moving how express and admirable, in action how like an angel, in apprehension how like a god! the beauty of the world, the paragon of animals—and yet, to me, what is this quintessence of dust?

Humans may be complex, capable of great heroism and deep depravity, yet it is worth stopping for a moment to look at the human body and mind to marvel in what we have become, and how we are made.

The visible design of the human body points out common features shared along with other members of the animal kingdom. Examples of these features are: two eyes, two ears, two nostrils, one mouth and four limbs, attached to a body and head. Detailed study of different seen parts of the body may, however, show some differences. For example, the presence of fingers and nails, hair distribution as well as a developed tail. While most members of the animal kingdom have teeth and a tongue, those two could also vary in their number and size, respectively, according to different species. Genetic investigations have shown that we humans share 99 % of our genes with animals, suggesting that our “earthly” component shares a common origin. Indeed, the twenty first century scientific findings match what is written in the Genesis story of creation, a story written over 3,500 years ago, well before genetic sciences came to light.

Creatures great and small

As for morphological differences between animal species, it is difficult to naively conclude why some are wild while others are man-friendly-even if the wild ones have different shapes, design, dietary habits, body size and life span. Other important observed features of the members of the animal kingdom are that they are all born, they all age, then ultimately die.

If we are to look at the unseen features of the members of the animal kingdom, we can again identify similarities. For example, all have a gastrointestinal tract, a cardiovascular system, a reproductive system, a respiratory system, a urinary system and much more. While these systems may differ slightly between species, the overall structure and function achieve similar purposes. For example, heart speed is faster in small animals like rats compared to big ones like elephants who have very slow hearts. Likewise, the respiratory system and the number of respiratory cycles per minute are significantly faster in running animals compared to the sedentary and slowly moving ones. Finally, the number of offspring also differs in different species, being just one at a time in big animals like elephants and horses, and many offspring in small animals like rabbits and mice. Such paradox between the number of offspring and animal size makes you think of the important determining role of the activity of those animals.

Unseen wonders

Now to turn to the rest of the animal kingdom and the unseen features of the human body. To start, let us look at the amazing functions of the human brain and its various functions. When humanity is sometimes described as the crown of creation, such a description is based on the superiority of human brain function and skills. Its sophisticated structure and how vital centres are created deep in the skull, to be protected from traumas, make you marvel. Also, the brain controls the different functions of the whole body, with its sensory and motor activities, various vital system functions including the lungs and the heart, all endocrine glands’ function, in addition to various receptors and centres that allow utmost precision and accuracy in everything we do. An example of this kind of precision is a doctor feeling a vein or an artery with the tip of a finger to insert a needle or a musician moving a finger a few millimetres while playing a violin, to produce the exact sound needed. Furthermore, the integrated function of human muscles, nerves and spinal cord is also amazing, let alone the synapsis between the nerve endings and muscle bundles, the chemicals secreted in them which allow electric stimulus transmission from the nervous system to achieve the motor function and desired movement.

The human brain also has the unique feature of storing knowledge. Of course, we should not ignore the importance of the training and programming ability of human brain. We learn how to drive a car, how to play games, how to study, how to operate safely on a sick patient. Such acquired skills are quite limited in other members of the animal kingdom. Moreover, the human brain has the unique ability to invent, discover, improve and correct errors it identifies.

Another very unique feature of human brain is its ability to conduct speech, a feature of humans that is under-developed in other members of the animal kingdom. While most animals can make noise and sounds, only humans can articulate words, sentences and even sing very complex songs. This unique ability seems to be the underlying mechanism behind the development of languages which are based on the human ability to talk and transmit information and knowledge by words and phrases.

The unseen brain has allowed human life to develop over time, building skills and achievements from generation to generation. Millennia ago, humans lived in huts together with animals, and now they build houses and palaces to live in. Centuries ago, we used donkeys, horses and camels to travel but now we use cars, trains, ships and airplanes. Our ancestors burned wood and coal to cook and to warm but now we use electricity to do these.

When we look carefully at the unseen parts of the human body, we also realize that we cannot alter any of it, despite the scientific advances made over the years. We can understand what harms our body and take measures to avoid it. Out of the ability of our brain to discover and invent, we have now produced science-based means for curing various diseases. Consider how we can replace a dysfunctional heart valve or a mobility-limiting joint. These inventions have resulted in a better quality of life, alleviating of symptoms, even helping to avoid early death, in some cases such as heart disease and cancer.

The heart of the matter

Another unseen source of life in humans is the heart. This fist-size organ is so complex in its structure and function. Recent scientific advances have enabled us to study heart function in milliseconds, hence the development of pacemaker treatments. They have also allowed clear imaging of the inside of the heart and the identification of pathologies, developments that guide practitioners to the optimum treatment of heart conditions. Recent discoveries have also allowed us to better understand how people develop coronary artery disease and how the pathology starts at the innermost layer of the arteries, particularly in individuals carrying significant risks for atherosclerosis including, smoking, high blood pressure, diabetes, high cholesterol and obesity. Amazingly, obesity has been shown to be the strongest underlying cause of other risk factors, hypertension, diabetes and hypercholesterolemia. So, nature cannot be blamed in many of these patients but our own patterns of behaviour. Science has shown that walking at least 5,000 steps each day, complying with the design of our body, reduces the likelihood of developing coronary artery disease by 15 per cent.

The unseen physiology of the rest of our body systems and the interaction between systems make us wonder how we are made. A rise of our body temperature by one degree due to a bug infection affects all body systems from the brain to the heart. A virus which cannot be seen by the most powerful microscope can destroy our lungs and cause premature death, as was the case with COVID-19 and others.

Finally, human inventions in the form of powerful microscopes have allowed scientists to study the human cell, which is the smallest living component of our body. Such small cells cannot be replicated in any factory in the twenty-first century, despite the vast scientific developments that surround us. You'll be surprised to learn how complicated and meticulously fine-tuned a human cell is and also how it functions, connects with other cells and other parts of the body. An example of this is the interaction between body minerals, calcium, sodium and potassium with heart and muscle individual cells. Such a function is critically controlled by many factors such as time, electric stimulation and pressure differences producing remarkably harmonious contractions and relaxation of the muscles without missing a beat.

Article

Comment

Language

Politics

27 June 2025

5 min read

Our public discourse needs responsible rhetoric before it is too late

The right turn of phrase can turn a nation, the wrong one can destroy

Tom Dove

Tom has a PhD in Theology and works as a hospital physician.

A crowd of people stand in the side steps of the Lincoln Memorial

Easter services, Lincoln Memorial.

George Pflueger, via Unspash.

When was the last time a brilliant piece of rhetoric made the headlines?

“Empty rhetoric.”

“Form over function.”

“Sloganeering.”

These—and other accolades—are stock trade when it comes to the art of denouncing public discourse. Red flags are rightly waved in the face of baseless claims and insincere promises. Scroll through a news reel; open a newspaper: language far stronger in style than in substance is not hard to find.

Nowadays we are sensitive to these kinds of abuses of public platforms. When Donald Trump speaks of the ‘Great Big Beautiful Bill’ or Elon Musk of the ‘Big Ugly Bill’ we know the cogs at BBC Verify are likely to be turning. Fact-checking is an established trade.

Sometimes political turns of phrase are just careless, inadequately thought through. Granted, a politician’s public address is often put together at a pace. Time is so remarkably tight that phrasing and formulations are not interrogated as fully as they might be. (Krish Kandiah recently picked up the Prime Minister’s “island of strangers” line and its unfortunate resonance)

But of course, the critiques I’ve listed above are themselves sharply rhetorical. They are punchy. Not drawn-out logical deductions. They aim to make us sit upright and win us over. Or move us to a course of action.

So: is rhetoric the problem? No. Its misuse is the problem. This isn’t always clear. And it’s the reason why simply decrying “rhetoric” won’t get us very far.

I am sympathetic to the suspicion. When efficiency and pragmatism tower high among the canons of public discourse, it is easier to trade in polarising x versus y expressions. Being guarded in the face of such potent idiom is understandable.

And yet the most remarkable public discourses in human history have been rich in rhetoric.

Martin Luther King at the Lincoln Memorial: “I have a dream.”

Churchill in the House of Commons: “we shall fight them on the beaches.”

Lincoln’s Gettysburg address: “government of the people, by the people, for the people.”

All these speakers knew that bare understanding doesn’t typically move people to action. An impassioned speech, a plea to respond, or beautifully woven prose often serve as the tipping point for social engagement.

Which leads me to wonder, what if a suspicion of smart speech-making ends up stunting social engagement, rather than fostering it? Perhaps political discourse today has gone too far; perhaps rhetoric is beyond repair. And yet: abuse doesn’t mean there isn’t proper use. There is a better way.

When persuasive powers are uncoupled from sound argument, then rhetoric obscures understanding and has become irresponsible.

In the classical era, training in rhetoric was a prominent feature of an education. You might say it was the way to avoid the charge: “All substance, no style”. It was about turning a sound argument into an art form. For Aristotle, rhetoric was about making use of the tools of persuasion—substance with style. But skill in persuasion was not a virtue of itself; it never stood alone. As Roger Standing has reminded us, “the function of rhetorical skills was not to persuade in and of themselves.” Indeed, training in rhetoric was training in responsibility.

In his classic 1950s text Ethics of Rhetoric, Richard Weaver put his finger on this. He highlighted that “rhetoric passes from mere scientific demonstration of an idea to its relation to prudential conduct.” True rhetoric, then, is this: the art of lighting up the path that leads from sound logic to good action.

Today, it seems that when it comes to the rules of rhetoric, communicators are answerable to polls and popularity. These ends justify the means, which makes fancy formulations fair game. If style secures votes, then it’s a good job done. But this means the communicator has no real accountability for his or her language. Pragmatism is in the driving seat. In a sense, responsibility has been handed over to the hearer.

This is problematic. When persuasive powers are uncoupled from sound argument, then rhetoric obscures understanding and has become irresponsible. Language is no longer illuminating, but misleading. It is trading on falsehood, or perhaps half-truths, instead of magnifying what is true for the sake of what is good.

Take an example. In the recent parliamentary debate over amendments to the assisted dying bill, the proceedings opened with the claim that “if we do not vote to change the law, we are essentially saying that the status quo is acceptable.” I don’t for a moment doubt the good intent in this claim—securing the most compassionate care possible for terminally ill adults. But let it be said: no, those who do not advocate assisted dying are not “essentially” saying this. This claim is a non sequitur: the conclusion does not follow the premise. It is logically unsound.

Like many tools, the art of persuasion can be wielded carelessly; sometimes maliciously. But rhetoric-free public discourse would make for a colourless and lifeless thing indeed. What we need now is rhetoric that is responsible—responsible to what is true and responsible to good outcomes. These should not be split; as soon as they are, speech-making becomes sterile or hollow. I recently heard the neat phrase: “Some people reach your mind by going through the heart, and some people reach your heart by going through your mind.” Yes, as the Christian faith has always maintained: mind and heart belong together. Give us words that awaken both, like those once spoken by that obscure wandering rabbi, Jesus of Nazareth, in one of the most studied and penetrating speeches in human history:

Blessed are the poor in spirit, for theirs is the kingdom of heaven.

Blessed are those who mourn, for they will be comforted.

Blessed are the meek, for they will inherit the earth.

Blessed are those who hunger and thirst for righteousness, for they will be filled.

I pray for public discourse brimming with both substance and style. It might help lead us to better things.

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