This is the third and final post about the talk I gave to my local U3A (University of the Third Age) philosophy group on March 4th, 2026. In it I focus on how Iain McGilchrist, philosopher and polymath, who lives on the Isle of Skye and in 2021 published The Matter With Things. Our Delusions and the Unmaking of the World, has been influenced by Heraclitus in his thinking about the nature of reality.
For the first two posts, and to understand the talk as a whole, see:
Everything Flows, Heraclitus and McGilchrist – Part 1
Everything Flows, Heraclitus and McGilchrist – Part 2
I have been following Iain McGilchrist’s work since he published his first major book, ‘The Master and His Emissary. The Divided Brain and the Making of the Western World’ in 2009. I first heard him talk about Everything Flows in 2019. But even though I have heard McGilchrist say that Heraclitus is his all-time favourite philosopher, I didn’t know enough about Heraclitus to realise how much he has influenced McGilchrist’s thinking and writing. This influence can be clearly seen in his books, and particularly in Part 3 of Volume 2 of The Matter With Things. This is a 500 page in depth exploration of The Unforeseen Nature of Reality.
In my U3A talk, I referred to three of the chapters that McGilchrist wrote in Part 3 of Volume 2 of The Matter With Things, that seem to relate very closely to Heraclitus’ philosophy – The Coincidentia Oppositorum, The One and the Many and Flow and Movement.
I only had time to make brief reference to instances where it seemed to me that McGilchrist had clarified, emphasised or added to Heraclitus’ philosophy.
The Coincidentia Oppositorum (which relates to Heraclitus’ key idea of the Unity of Opposites)
McGilchrist has many similar ideas to Heraclitus, but he uses modern language and advances in science to explore these.
He tells us that opposites are not mutually exclusive. It is not the case that the further you go towards one end of the line, the further away you are from the opposite end. If you go far enough in any direction you reach not more of what you desire but its opposite. Opposites go full circle and eventually coincide. The example I have heard him give of this is that extreme religious fundamentalists and extreme atheists ultimately have the same world view. They are both uncritical of their beliefs which they think are infallible and they both cannot see alternative perspectives.
McGilchrist emphasises three points in relation to Heraclitus key idea of the Unity of Opposites. First, he tells us that the Unity of Opposites can be misunderstood as resolving a contradiction. But he says, opposites don’t just unite. Rather they coincide. They fall into one another to reveal a deeper truth. He asks us to imagine placing two images on top of one another. They do not merge to create a static whole but fall together in dynamic creative tension and reveal a new image.
Second McGilchrist emphasises this generative creative power of opposites saying opposing forces are necessary and interdependent. Heraclitus used the bow and lyre as metaphors to explain this. McGilchrist uses friction saying that constraint on movement is what makes movement possible. Just a certain amount is needed. Too much or too little friction and there is no movement. The opposing forces must be kept in balance.
The third point he emphasises is that a thing and its opposite can both be true at the same time. Opposite truths do coincide. We must therefore accept both and we should stay with the contradiction. He quotes A.N. Whitehead as saying: To have seen it from one side only is not to have seen it.
McGilchrist believes that happiness comes from integrating opposites and reconnecting with whole.
The One and the Many (which relates to Heraclitus’ key idea of Logos)
According to McGilchrist this key idea is often overlooked in relation to Heraclitus’ philosophy. The One and the Many addresses a key philosophical question: Is reality a single unified thing or a collection of distinct multiple things?
For Heraclitus and McGilchrist reality is both single and multiple. For Heraclitus the One (Logos) represents the single underlying essence of reality and the Many represents multiplicity, diversity, change and flux. The One (Logos) is a process that holds the Many (conflicting opposites) in tension.
In my last post I wrote that McGilchrist has said that Logos is an unword and that in our Western world the equivalent unword is God. I have also heard McGilchrist refer to God as a process.
Heraclitus wrote about the One and the Many as follows:
The One is made up all things, and all things issue from the One
Listening not to me but to the Word (Logos), it is wise to agree that all things are One
For McGilchrist all is one, but also all is many. Everything is interconnected. The One and the Many are not contradictory but mutually defining. The One and the Many are two sides of the same coin. The important point, according to McGilchrist, is that a healthy understanding of the world involves integrating these two perspectives. It involves ‘both/and’ rather than ‘either/or’ thinking.
For McGilchrist we must move beyond black and white thinking. Societies need unity and diversity. Overemphasis on unity leads to rigid totalitarian societies. Overemphasis on diversity leads to fragmented societies.
‘Both/and’ thinking acknowledges that everything is in flux and subject to change. Not just being but also becoming.
Flow and Movement (which relates to Heraclitus’ key idea of Everything Flows)
For Iain McGilchrist flow is not primarily about change but equally about persistence and permanence. The river is ever changing but ever the same. Heraclitus wrote:
By changing it remains the same
McGilchrist also emphasises the relationship between flow and resistance. He believes that a balance between flow and resistance is essential for creativity and understanding. Nothing can come into being without a degree of resistance. Flow is the ultimate reality, but resistance is essential for creation.
McGilchrist asks us to imagine introducing resistance, such as a stick or stone, into a flow of water, a river, or stream. We have probably all seen that this creates difference and form. Behind the stick or stone, we see eddies and patterns in the water. McGilchrist uses the example of a whirlpool to talk and write about this. He says the whirlpool is not a thing in itself. It cannot exist without the water. It momentarily takes on a specific temporary dynamic form which can be photographed, measured and has the power to move things, but eventually dissipates back into the river.
McGilchrist suggests that the whirlpool is an analogy for existence, a metaphor for our lives. It serves as a metaphor for birth, life and death as one fluid motion.
McGilchrist says we are temporary manifestations within the flow. We are not separate from the underlying reality but momentary configurations of it. After a while the whirlpool resolves and merges back into the mainstream of the river, its energy changing form rather than ceasing to exist.
We, as individuals, ultimately integrate back into the great stream of things.
For both Heraclitus and McGilchrist flow is the ultimate reality.
For Heraclitus:
- Logos is the underlying principle that structures reality.
- Logos expresses as ever burning fire which symbolises constant change.
- Constant change/flux is the result of dynamic tension between opposites.
- Logos unifies opposites bringing them into harmonious but constantly shifting balance where everything is in a state of perpetual becoming.
McGilchrist takes this further emphasising:
- The generative power of opposites that drives all creation.
- The importance of the One and the Many, Unity and Diversity, ‘both/and’ thinking and alternative perspectives.
- That flow is about change but also about permanence.
- That resistance is essential for creativity and understanding.
So What?
At the end of my talk, I asked the group to consider the question ‘So What?’
What does it matter whether ultimate reality is static or a continuous flow?
For me there are many implications from Heraclitus’ philosophy that remain relevant to our lives today. Some of these relate to
Our view of reality as constantly changing or static
The meaning of stability in life
The role of conflict in our lives
The idea of the stable self and identity
The nature of truth
The nature of knowledge and education. How we can truly know anything if everything is constantly changing.
The implications of Heraclitus’ philosophy for an ethical life
References
McGilchrist, I. (2009). The Master and His Emissary. The Divided Brain and the Making of the Western World. Yale University Press.
McGilchrist, I. (2021). The Matter With Things. Our Brains, Our Delusions, and the Unmaking of the World. Perspectiva Press.













