Chapter 11
From Caterpillar to Butterfly
A glimpse of what God is calling you into
Somewhere in the middle of this book, I want to stop walking and stand still for a moment.
We have spent a lot of time so far on the process of renewal — how the mind works, why it gets stuck, what the science says, what the Bible says, how the path of transformation actually unfolds in real life. All of that is essential. Most readers, in my experience, need that scaffolding before they can begin the work. But there is a danger in spending too long inside the mechanics of any process. You can forget what the process is for. You can find yourself studying the map so carefully that you stop dreaming about the destination.
So this chapter is, in a sense, a pause.
It is the chapter where I want to lift your head from the page for a moment and let you see — not what you have to do, but what you are walking toward. Because if the destination is not glorious enough to be worth the work, the work will quietly grind you down. Vision is what sustains effort. And before we walk into the final third of this book — the battle, the habits, the relationships, the calling, the grace — I want to make sure you have a glimpse of what God is actually calling you into.
The glimpse, I think, is best seen through a creature most of us first met in primary school.
A caterpillar.
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The word God uses
You will remember from the beginning of this book that the Apostle Paul did not say change yourself.
He said this:
“Be transformed by the renewing of your mind” (Romans 12:2).
The Greek word is metamorphoō (μεταμορφόω). I introduced it to you in the Introduction, but I want to bring it back now, because we have come a long way since then, and the word means something even more dazzling on this side of the journey than it did on the other.
Metamorphoō is the word from which the English word metamorphosis is directly descended. It is the word a biologist uses when describing what happens to a caterpillar inside a chrysalis. It is the same word the Gospel writers reach for when they describe what happens to Jesus on the mountain when He is transfigured before His disciples — his face shone like the sun, and his clothes became as white as the light (Matthew 17:2). It is not a small word. It is one of the most dramatic biological and theological words in the entire New Testament.
And this is the word Paul deliberately chose for what God wants to do with your life.
Notice what he did not say.
He did not say be improved. He did not say be tidied up. He did not say be a slightly better version of who you already are. He did not say make a few small changes around the edges and you will be fine. He could have used any number of softer Greek words for that, and he did not use any of them.
He used metamorphoō.
A word so radical that the creature you become at the end of the process is, in some real sense, not the same creature you were at the beginning.
That is what God is offering you.
Not change. Transformation.
And there is, I have come to believe, a world of difference between the two.
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What we usually mean by change
Most of us live our lives in a low-grade, constant pursuit of change. We change our hairstyles, our wardrobes, our diets, our gym routines, our phones, our cars, our living rooms, our jobs, our churches, and — sadly, and far too readily for those of us who follow Christ — sometimes even our spouses. We work very hard at change. We are, as a generation, exhausted by how much changing we do.
And yet most of us, if we are honest, end up feeling like we are running fast and not really getting anywhere.
The reason, I think, is that change at the external level rarely produces transformation at the internal level. You can change everything about your life and remain fundamentally the same person inside it. You can redecorate the cell, you can install a nicer bed and put up some new curtains, and at the end of the project you are still in the same cell. The lock has not moved.
Transformation is not the redecoration of the cell.
Transformation is the coming out of it altogether, into a life you literally could not have lived inside the old one.
That is metamorphoō. And this is why God will not settle for less than this for you. He is not, in the deepest part of Him, trying to get you to make a few good resolutions and stick to them. He is, with infinite patience and infinite love, working to turn you into a different kind of creature — one that can do, and feel, and see, and bear, and love, and forgive, things the old version of you simply could not.
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What actually happens in the chrysalis
When I was a child at school, I remember being taught about the life cycle of the butterfly, and I remember the lesson with a clarity I do not remember most other lessons from those years. There was something about it that gripped me. We were shown pictures of a caterpillar — a slow, crawling, leaf-eating, low-to-the-ground creature with too many legs and absolutely no glamour — and then we were shown a butterfly. A butterfly! All colour and lightness and altitude.
And we were told these were the same animal.
I do not think I quite believed it at the time. I do not think I quite believe it now.
But here is what I have learned about the chrysalis stage in the years since, and it is so extraordinary that I think every Christian should know it. Because metamorphoō — the word the Holy Spirit reached for through Paul’s pen — is not a poetic exaggeration. It is biologically accurate. And when you understand what is happening inside that little brown shell hanging from the underside of a leaf, you understand something about what God is doing inside you.
When the caterpillar has eaten enough, grown enough, lived its leaf-bound life long enough, something inside it begins to change. It finds a quiet place — usually underneath a leaf or against a branch — and it begins to spin around itself the casing we call a chrysalis. From the outside, the chrysalis looks like very little. A small, motionless object. A pause in the story. Nothing seems to be happening.
But on the inside, something almost violent is going on.
The caterpillar does not simply grow wings inside the chrysalis. That is what I had assumed as a child. The reality is far stranger. Inside the chrysalis, the caterpillar’s body releases a flood of enzymes that begin to dissolve most of its own tissue. Almost the entire creature breaks down into what biologists, with quiet poetry, call cellular soup. The legs, the eyes, the digestive system, the body of the caterpillar all break down into a kind of organic raw material — and out of that raw material, an entirely different creature is rebuilt.
A new respiratory system. A new digestive system. New eyes — compound eyes, capable of seeing colours and even wavelengths of light the caterpillar could never see. A long, coiled feeding tube where there used to be chewing jaws. A wholly new exoskeleton. And, most famously, wings — wings that, in many species, are folded and packaged with such mathematical precision inside the chrysalis that nobody who studies them has ever fully tired of the wonder.
When the butterfly finally emerges, it is not a caterpillar with extras. It is, structurally, biologically, functionally, a different creature. Same DNA. Same essential identity. But almost everything about how it lives, what it can do, where it can go, has been rebuilt from the inside out.
That is metamorphosis.
That is the word God chose.
I do not think the Holy Spirit reached for that word by accident.
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The capability gap
Now here is what I want you to sit with for a moment, because this is the part that I think genuinely changes how a person prays.
There is a capability gap between the caterpillar and the butterfly that is, when you think about it, almost unbelievable.
A caterpillar, no matter how strong, no matter how clever, no matter how determined, cannot fly. It is not a moral failing. It is not a question of effort. It is a question of capacity. The caterpillar simply does not have the structure that flight requires. You could give it a coach, a motivational seminar, a five-step plan, a healthy diet, and a positive attitude — it will still not fly. It is not built for it. The architecture is not there.
A butterfly, on the other hand, can.
A butterfly can rise to altitudes the caterpillar could not have imagined. The Monarch butterfly, perhaps the most studied of all the species, has been recorded flying as high as 3,500 metres — more than two miles up. Some species of butterfly can travel several thousand miles in a single annual migration; the Painted Lady, a butterfly you can often see in British gardens, has been tracked making round trips of around 9,000 miles. They can see colours the human eye cannot. They can sense ultraviolet light. They can taste with their feet. They navigate by the sun, the magnetic field of the earth, and chemical cues we are only beginning to understand.
That is not a slightly upgraded caterpillar. That is a whole new operating system.
And here is what I want you to hear, because this is what the chapter has been quietly building towards.
That capability gap is what God is offering you.
There are heights of joy a renewed mind can climb that an unrenewed mind simply cannot. There are distances of love a transformed person can cross that an untransformed person could never have made. There are colours of grace that the old eyes were not built to see. There is a freedom, a peace, a creativity, a steadiness, a fruitfulness, that the caterpillar version of you did not have the structure for. Not because you weren’t trying hard enough. Because you weren’t built for it yet.
This is, in a way, one of the most important sentences I will write in this book. So I want to say it plainly:
Most people spend their whole lives trying to change a hundred things. God is asking you to change one thing — and when you change it, He will transform everything.
That one thing is your mind.
And when the mind is renewed, the rest of you starts to come with it.
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What this looks like in real lives
I want to be careful here, because the kind of language we have just used — new capabilities, new heights, new freedoms — can drift very quickly into the sort of slick prosperity talk that I want this book to stay well away from. So let me be specific and honest.
Transformation is not a promise of a bigger house. It is not a guarantee that your business will triple in size by next Christmas. It is not the assurance that every difficulty in your life will dissolve the moment you read your Bible properly. The Christian life will still contain disappointment, suffering, mystery, and grief. Caterpillars do not stop existing. The butterfly still gets rained on.
But the capacity with which you meet your life — that is what the renewing of the mind changes. And that change does, in time, work its way outwards into every observable corner of your life.
I have seen it in leaders who lived with a constant, low-grade anxiety about being found out. Imposter syndrome, you would call it now. They perform brilliantly, but every meeting is a small ordeal. Every promotion arrives under a cloud of what if they realise I shouldn’t be here? And then, slowly, over a number of years, the mind is renewed. The person comes to genuinely believe what Scripture says about identity in Christ — about being chosen, beloved, accepted, equipped, placed in the role God wanted them in. The anxiety does not vanish overnight. But it loses its dominion. And in the years that follow, the same person becomes more peaceful, more decisive, more generous to those around them, and more effective in their work than they ever were in the years when fear was running the show. Same person. Same desk. Same colleagues. Renewed mind. Transformed life.
I have seen it in marriages that came back from the brink, not because anything dramatic happened, but because one person began to seriously work on what was going on in the inside of them. The old voice had said: they don’t understand me. They don’t appreciate me. I deserve better than this. The renewed voice slowly began to say something quite different: I have been listening to my soul instead of leading it. I have been waiting for them to change instead of asking God to change me first. That single shift — small, internal, unspectacular — set in motion a recovery that years of arguing had not been able to produce.
I have seen it in pastors who, after years of plateaued ministry, began to take the renewal of their own mind seriously and, almost as a side-effect, found their churches beginning to grow in ways they had been begging God to bless for a decade. Not because they had changed a programme or hired a consultant. Because they had been transformed, and the people around them began to feel it.
I think of people who, after years of carrying shame from their childhood, began to speak back to the lies that had been narrating their identity, and have slowly, quietly, become some of the most settled, joyful, generous people I know.
This is not a list of miracles, in the sense of dramatic supernatural events. This is the normal fruit of a renewed mind. This is what the Bible has always said would happen.
Renew the mind. And the life, in time, will rise to meet it.
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Letting go of the old creature
There is, however, one part of this picture I do not want to pass over too quickly. Because it is the part that almost everybody trips on, including me.
A butterfly cannot be both a caterpillar and a butterfly.
At some point in the process, the old creature has to go.
This is, perhaps, the hardest thing about transformation. Most of us secretly want to be transformed while keeping the option of going back. We want the wings, but we also want the leaf. We want to fly, but we also want the safety of being low to the ground and unnoticed. We want the new identity, but we also want the comfort of the old one in case the new one doesn’t work out.
It does not work like that.
Paul writes it plainly. Therefore, if anyone is in Christ, the new creation has come: the old has gone, the new is here (2 Corinthians 5:17). Notice the past tenses. The old has gone. It is not waiting in the cupboard in case you need it again. It is not in storage. It is gone.
And yet so many of us live, year after year, as if the old creature is still our backup plan. We pray for transformation while quietly negotiating with the parts of ourselves that we are not really willing to let dissolve. We want the chrysalis, but we want to come out the other side as a slightly nicer caterpillar.
It does not work like that.
Letting go of the old version of you is hard. Some of it was, frankly, your home for a very long time. The grudges that gave you a sense of righteousness. The cynicism that protected you from disappointment. The performance that kept you ahead of being known. The self-pity that quietly justified everything. The anger that gave you fuel. The cracker man’s bag, that the cracker man had been eating from for so long it felt as if his life depended on it. All of it. The Bible is not afraid of these things. But it also will not allow them on the next leg of the journey.
If you want the butterfly, the caterpillar has to go.
And the wonder of it is that the new creature is not a stranger to you. The new creature is, in some deep mystery, the version of you that the Lord has been quietly making all along. The same you. The same fingerprint. The same name written in His book. But finally able to fly.
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The butterfly was always inside the caterpillar
I want to leave you with a picture before we move into the final chapters of this book.
Imagine, for a moment, a caterpillar at the very edge of the chrysalis stage. He has eaten his fill of leaves. He has crawled the leaves all his life. He has never been above the ground by more than a few inches. He does not know what is about to happen to him. From inside his small green world, all he knows is the leaf, the texture, the slow business of chewing and growing.
And imagine, on a branch above his head, an old butterfly, resting in the sunlight. Wings open. Bright. Effortless.
The caterpillar looks up.
He does not believe, in his caterpillar mind, that he is connected in any way to the creature he is looking at. He cannot imagine it. That is a different kind of life. That is for other creatures. That is not for me.
But God, looking at the same scene, sees one creature in two stages.
The butterfly was always inside the caterpillar.
The flight was always inside the wings that had not yet formed.
The capability was always inside the design.
It only needed the renewing to come out.
That is what God sees when He looks at you. He does not see the caterpillar life you are currently living. He sees the butterfly life that is already, in some real way, inside you, waiting for the renewing of your mind to release it.
You are not stuck being who you have been.
You were not built to crawl forever.
The chrysalis is not your prison. It is your passage.
And the wings — the wings have been folded inside you all along, waiting for the moment when you finally, truly, believed that you were made for flight.
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Now — let’s talk about the walk
So here is where I want to leave you, at the midway point of this book.
You have, I hope, just caught a glimpse of what God is calling you into.
Not change. Transformation. Not a slightly improved caterpillar. A butterfly. Not a life shaped by what has happened to you, but a life shaped by what you were made for.
That is the destination.
But seeing the destination is not the same as walking there. And the rest of this book — the chapters that follow this one — is about the walk. Because if I left you here, on this branch, looking up at the butterfly, and never gave you any of the practical realities of how to make the journey, I would have failed you.
There is, I have to warn you, a battle you are going to have to face. The very moment a person catches a vision of what they are capable of becoming in Christ, something rises up in resistance to it. We will look at that battle together in the next chapter, so you are not blindsided by it.
There are habits you are going to need to build, because the renewed life is not sustained by inspiration but by daily, unspectacular practices that keep the renewal flowing.
There are relationships that will be tested and transformed by the work God is doing in you, and we will look at what that costs and what that yields.
There is a vision and calling on your life that God has been preparing for you since before you drew breath, and the renewed mind is, in the end, the doorway into actually living it.
And — perhaps most importantly of all — there is a grace that will carry you when you fall. Because you will fall. We all do. And the final chapter of this book is going to make sure you know, before we close, exactly who has been carrying you the whole way.
So lift your head. Catch the glimpse. Hold it.
You were not built to crawl forever.
Now let’s walk.
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Personal reflection
• What butterfly capability has God been quietly putting on your heart — the kind of life or fruitfulness that the caterpillar version of you has been insisting is not possible?
• What is the old creature in you that God is asking you to let go of, in order for the new one to come up?
• Where in your life have you been trying to change a hundred things, when the truth is that God is asking you to change one?
• If God can take a caterpillar and turn it into a creature that can fly thousands of miles, cross continents, and see ultraviolet light — what might He be inviting you into?
• What would it mean, this week, to walk into the remaining chapters of this book genuinely believing that you were made for more than the life you are currently living?
Declaration
I was not built to crawl. I was made for transformation. The butterfly has been inside the caterpillar all along, and the renewing of my mind is the passage by which God brings it out. The old is going. The new is here. And I will keep walking, chapter by chapter, day by day, until what God has placed inside me finally has the room to fly.