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

Belief

Church and state

Comment

Politics

3 September 2025

5 min read

Sorry, Danny Kruger, a Christian nation is a bad idea

Quite simply you cannot build a nation-state on the teaching of Jesus

Sam Tomlin

Sam Tomlin is a Salvation Army officer, leading a local church in Liverpool where he lives with his wife and children.

An English flag flies on a church tower.

Different Resonance on Unsplash.

Danny Kruger has become one of my favourite politicians in recent months. His contributions in parliamentary debates on assisted suicide and abortion have endeared him to many Christians including myself as he has led the charge (along with other notable parliamentarians and thought leaders) against what has been dubbed the ‘parliament of death,’ exposing the shaky ethical foundations on which they lie.

He entrenched this reputation with many Christians with a recent speech on the ‘Christian foundations’ of England (‘out of which the United Kingdom grew’) and a passionate plea to recover such foundations. This speech went viral in Christian circles as it articulated the aspirations of many to re-establish Christianity as a national force, specifically in the physical representation of power, the House of Commons. The speech ticked all of the ‘Christian nationalist’ boxes: Christianity should be the ‘common creed’ of the country; England was founded ‘uniquely among the nations’ on ‘the basis of the Bible’; it is the ‘oldest Christian country’; ‘the story of England is the story of Christianity operating on a people.’ A remarkable set of claims to make the butterflies flutter in any Christian’s stomach, surely?

This vision of a ‘Christian nation,’ however, typically represented by Kruger is based on an understanding of Christianity which bears little resemblance to its central character: Jesus. There is much talk of ‘nationhood’ and ‘biblical values’ in such thinking, but tellingly little about Jesus himself (Kruger’s speech makes one passing reference to him). The reason is not complicated. Quite simply you cannot build a nation-state on the teaching of Jesus.

Every nation-state (including England, the ‘prototype’ of such a concept, according to Kruger) was formed though violent subjugation of rival tribes and narratives, establishing a monopoly on the means of legitimate violence to centralise power for princes to wage war and protect private property. Jesus’ commands to love one’s enemies, pray for those who persecute you, not resist evildoers and give away possessions are not simply an inconvenience to such a programme, but are profoundly impractical. Like an embarrassing and awkward family member turning up uninvited to a wedding, they stand opposed to a ‘civilisational Christianity’ which seeks to be the ‘chaplain of nations’ as Kruger suggests, resisting any attempt at baptising and polishing a version of what remains Machiavellian statecraft.

These two forms of Christianity are in fact little more than two sides of the same coin and there is a more fundamental distinction to be made.

Like a cricketer putting on extra padding to face a fast bowler, Christian ethics softens the blow of such radical expectations by suggesting that Jesus can’t really have meant what he said, especially for modern, enlightened folk today. Perhaps Jesus expected the Kingdom of God to arrive more quickly than it did and as time progressed, we needed a more practical ethic. Not wanting to abandon Jesus, his teaching is reduced to general ‘values’ like ‘love’ or ‘justice,’ the content of which in fact become the precise opposite of what Jesus taught. ‘Jesus may have said to love enemies, but we will be less safe if we do, so we had better kill them.’ ‘Jesus may have said not to love money, but our economic systems which seem quite good at alleviating poverty rely on this, so greed isn’t so bad.’

It may sound as if I am opposing Kruger’s vison for the alternative option in the culture wars. It is often suggested that there are two ‘Christianities’ at work in the West: one represented by Kruger might be called the ‘Christian right,’ which emphasises family values, patriotism and the importance of place, the other (at which Kruger takes aim in his speech), a left-wing or ‘woke’ Christianity which stresses welcoming the stranger, economic justice and identity politics.

This is a red herring, however. These two forms of Christianity are in fact little more than two sides of the same coin and there is a more fundamental distinction to be made. For while they might disagree on content, the method is remarkably similar. Left-leaning Christians may disagree with Kruger on his definition of a Christian nation but would uphold the desire for the nation-state to be founded on values they consider Christian. The common assumption is that Christianity is a ‘civilisational’ force, ideally enacted by Christians and their narrative taking hold of the levers of power and influence and dominating the ‘public square.’

If Jesus’ teaching is not supposed to be embodied by the nation-state, however, what is its purpose and does this not leave the public square to malevolent forces, as Kruger suggests? Jesus’ teaching is indeed directed at a particular body of people who are supposed to embody it publicly, and that is the community explicitly committed to follow and structure social life around the living presence of Jesus; this is the church. The New Testament even suggests the language of nationhood is appropriate for this body as a new nation is being formed around the person of Jesus who commands the allegiance that modern nation-states claim for themselves.

Kruger’s vision of the Church of England’s parish system is where ‘we are all members, we all belong, even if you never set foot in your church from one year to the next, even if you don’t believe in its teachings, it is your church, and you are its member.’ This is a million miles away from the vision of the New Testament where entry into this newly formed community implies active repentance and a collision with the ways of the world represented by mere ‘values.’ If that makes me part of ‘another eccentric denomination’ according to Kruger, then so be it.

To suggest that this alternative vision cedes the ‘public square’ to malevolent forces also betrays a lack of imagination around the public nature of the church. It is assumed that if Christians retreat from the ambition to explicitly and directly make our nation-state Christian then we relegate our religion to the realm of the ‘private’ and succumb to the worst elements of Enlightenment fears about religion in the public square. The earliest Christians had no explicit desire to ‘transform the Roman empire and make it Christian’ but simply took Jesus at his word on wealth, forgiveness, welcome of the stranger and proclamation of salvation and the life made possible by Jesus’ death and resurrection. This was their public witness and it just so happened that it utterly transformed the communities in which these followers of Jesus were situated at the same time. This vision certainly has a place for Christians engaging in politics as Kruger has in debates on assisted suicide for instance, exposing the shaky foundations of any form of life not founded on the life made possible in Jesus. This is most appropriately done, however, without reaching for language that implied the state has salvific qualities, language Christian teaching rightly reserves only for God himself.

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