The Quiet Wisdom of the Kidneys: Lessons from the Water Element
- Nic Greenan

- 3 days ago
- 8 min read

When we began planning our healing calendar, I noticed that the Kidneys and Urinary System were scheduled together.
Without hesitation, I knew I wanted to write that healing.
The certainty surprised me.
Of all the organs in the body, why the kidneys?
It wasn’t until I sat down to write our Kidney Healing that I realized something.
I had already spent years studying the kidneys.
Not in a classroom.
Not through textbooks.
But through one of the greatest teachers, I have ever known.
My dog, Kaupo.
Several years ago, Kaupo was diagnosed with adrenal carcinoma with vascular invasion. He underwent surgery that removed one adrenal gland and one kidney. It was a devastating diagnosis, and we knew the statistics surrounding that type of cancer.
Like anyone receiving news like that, we hoped for the best while quietly preparing ourselves for the possibility that our time together might be much shorter than we wanted.
Instead, we were given years.
As time passed, however, his remaining kidney gradually began to fail.
From that point forward, caring for his kidneys became part of our daily rhythm.
Several days each week, I prepared his subcutaneous fluids.
I immersed myself in learning everything I could.
Nutrition.
Hydration.
Electrolyte balance.
The extraordinary resilience of the kidneys.
Most of all, I learned to pay attention.
Every meal mattered.
Every treatment became an act of hope.
Every decision became another opportunity to support the remarkable work his remaining kidney was still capable of doing.
The goal was never to pretend he wasn’t sick.
The goal was never to fight reality.
The goal was to give his body every opportunity to express the greatest health that was still available to him.
Against every expectation, Kaupo far outlived his prognosis.
But far more importantly, he continued living.
He hiked mountains.
He wandered forests.
He walked beaches.
He chased waves.
He greeted each day with curiosity.
He remained playful, stubborn, deeply loved, and completely himself.
He was my soul dog.
Looking back, I realize I wasn’t only learning how to care for Kaupo.
I was learning how extraordinary the kidneys truly are.
Only years later, as I sat down to write this healing, did physiology give language to what experience had already taught me.
The kidneys are among the quietest - and most remarkable - organs in the human body.
Often thought of simply as the body’s filtration system, they quietly perform hundreds of essential functions that sustain life. Every day, approximately 180 liters of fluid pass through the kidneys, where an intricate network of nearly one million nephrons within each kidney continuously evaluates what the body should preserve and what it is ready to release.
Together with the ureters, bladder, and urethra, the kidneys form the urinary system - a beautifully coordinated network that not only removes waste but continually protects the body’s internal environment through the careful regulation of water, minerals, acidity, and fluid volume.
Water is reclaimed.
Electrolytes are balanced.
Blood pressure is regulated.
Acid-base balance is maintained.
Vitamin D is activated into its usable form.
Erythropoietin is produced to stimulate the production of red blood cells, ensuring oxygen can be delivered throughout the body.
Perhaps even more remarkable than everything the kidneys do is how they do it.
Long before blood tests reveal a problem, healthy nephrons quietly begin compensating for damaged ones. They assume more work. They reorganize. They adapt. They preserve function for as long as possible.
The kidneys rarely ask for recognition.
They simply continue serving life.
Within Traditional Chinese Medicine, the Kidneys are associated with the Water Element and the storage of Jing - our deepest constitutional essence. Jing is understood as the foundation of vitality, growth, development, resilience, reproduction, and healthy ageing. It reminds us that our life force is precious and worthy of careful stewardship.
Although modern physiology and Traditional Chinese Medicine describe the kidneys through different frameworks, they arrive at a remarkably similar understanding.
The kidneys are not simply organs of elimination.
They are guardians of the body’s inner waters.
They are organs of preservation.
As I continued writing the healing, I found myself returning again and again to the Water Element.
Across healing traditions, water has always represented something greater than a physical substance.
It nourishes.
It cleanses.
It stores.
It adapts.
It yields without weakness.
It persists without force.
Water never argues with the landscape.
It simply finds another way.
It teaches us that resilience is not hardness.
It is responsiveness.
The ability to adapt without losing our essential nature.
Perhaps that is why the kidneys embody the Water Element so beautifully.
Every day they ask the same quiet questions.
What should the body preserve?
What is ready to be released?
Perhaps these are not only physiological questions.
Perhaps they are among the deepest questions healing ever asks of us.
Looking back, I realize I wasn’t only learning about kidneys.
I was learning about water.
Every treatment represented possibility.
Another sunrise.
Another walk.
Another beach.
Another adventure.
Another ordinary day that quietly became extraordinary because we were still living it together.
Water wasn’t simply hydration.
It was preservation.
It was nourishment.
It was relationship.
It was life itself.
Healing is not always the absence of disease.
Sometimes healing is creating the conditions where life can continue expressing itself as fully as possible.
Sometimes healing is reducing suffering.
Sometimes healing is preserving vitality.
Sometimes healing is making room for another joyful day.
For a long time, I believed I was simply learning how to care for Kaupo.
Only later did I realize he was also teaching me how to care for myself.
He taught me that healing often begins with paying attention.
Noticing subtle changes before they become significant.
Responding consistently rather than waiting for crisis.
Honoring what the body needs instead of pushing beyond its limits.
Looking back, I sometimes wonder why it was easier to offer that level of devotion to someone I loved than it was to offer it to myself.
Perhaps many of us do that.
We become experts at caring for everyone else while quietly postponing our own healing.
Perhaps that is another quiet lesson of the kidneys.
They do not wait until the body is in distress before they begin caring for it.
Every moment of every day they are making thousands of tiny adjustments to preserve balance.
Our own wellbeing is often built in the same way.
Self-care is rarely one dramatic decision.
More often, it is a thousand quiet choices.
Choosing nourishment before depletion.
Rest before exhaustion.
Water before thirst.
Presence before urgency.
Compassion before criticism.
As I navigated my own health challenges in the years that followed, I found myself returning again and again, to the lessons Po had already taught me.
The same patience.
The same attentiveness.
The same willingness to meet the body where it was, rather than demanding it be somewhere else.
In many ways, caring for him became the foundation for learning how to care for myself.
Then, on the second-to-last day of Kaupo’s life, another piece of the puzzle quietly arrived.
His breathing had become noticeably labored.
That same day, I unexpectedly joined a Universal Healing focused on the lungs.
I hadn’t planned to be there.
It simply appeared at exactly the moment his breathing was becoming more difficult.
During that healing, I learned something I had never encountered before.
Within Traditional Chinese Medicine, the lungs are associated with the Po - the corporeal soul. The Po is understood as the aspect of consciousness most intimately connected with the physical body. It governs instinct, sensation, breath, and our capacity to fully inhabit physical life. As life draws to a close, it is also associated with our capacity to let go.
Everyone had affectionately called my dog “Po.”
It had been his nickname for years.
I had never questioned it.
Then suddenly, hearing those words while sitting beside him, something quietly aligned.
I don’t know whether it was coincidence.
I don’t know whether it was synchronicity.
But it gave me a language for what I was witnessing.
Not simply the physiology of dying.
But the profound relationship between preserving life and releasing it.
It didn’t change what was happening.
It didn’t change the outcome.
But it transformed how I experienced those final days.
It didn’t explain my grief.
It gave my grief a place to rest.
One of the things I find most fascinating is that both modern physiology and Traditional Chinese Medicine recognize an intimate relationship between the kidneys and the lungs.
They simply describe that relationship through different languages.
From a physiological perspective, the kidneys and lungs work continuously together to maintain the body’s internal equilibrium.
The lungs regulate carbon dioxide.
The kidneys regulate bicarbonate.
Together they maintain the delicate acid-base balance required for every cell in the body to function.
The kidneys regulate fluid volume.
The lungs depend upon that fluid balance to exchange oxygen efficiently.
The kidneys produce erythropoietin, allowing the body to create red blood cells capable of carrying oxygen.
The lungs provide the oxygen those cells transport.
Neither system works in isolation.
Each quietly supports the other.
Traditional Chinese Medicine describes this same partnership differently.
The lungs gather and descend Qi.
The Kidneys receive it.
They are said to “grasp the Qi,” anchoring the breath deeply within the body.
One tradition describes chemistry.
The other describes energy.
Both recognize an extraordinary partnership that sustains life.
For years I had watched Kaupo’s kidneys preserve life.
Now I was witnessing his lungs preparing to release it.
One preserves.
One releases.
Both serve life.
Healing, I realized, asks us to honor both.
There are seasons for preserving.
There are seasons for restoring.
There are seasons for adapting.
And eventually, there are seasons for releasing.
None of these seasons is a failure.
Each belongs to life.
Kaupo eventually died from cancer.
But cancer is not what I remember most.
I remember years we were never promised.
I remember quiet mornings preparing his treatments before heading out for another adventure.
I remember beaches.
Forests.
Mountains.
Joy.
I remember unconditional love.
I remember a relationship that taught me more about healing than I could ever have anticipated.
For many years I shared our adventures using the words Kaupo Medicine.
At the time, I thought I was describing the joy of having such an extraordinary companion.
Looking back, I realize I was also naming the medicine he was quietly offering.
He taught me that healing isn’t always measured by the disappearance of disease.
Sometimes it is measured by the quality of life that remains.
By the courage to keep showing up.
By the willingness to preserve what is precious.
By the wisdom to recognize when life is asking something different of us.
As healers, we often hope to restore health.
Sometimes we witness extraordinary recoveries.
Sometimes we support profound transformation.
And sometimes healing takes a quieter form.
Sometimes it is found in preserving dignity.
Sometimes it is found in reducing suffering.
Sometimes it is found in helping another being experience as much life as possible with the body they have.
That, too, is healing.
Perhaps that is the quiet wisdom of the kidneys.
Through the Water Element, they remind us that resilience is not rigid.
It is fluid.
It adapts.
It nourishes.
It quietly preserves what can be preserved.
And when the time finally comes, it reminds us that releasing can be just as sacred as preserving.
Perhaps those have always been the kidneys’ two greatest teachings.
To care deeply for life while it is here.
And to honor it just as deeply when it is time to let go.


Simply, beautifully stated!