Early in medical training, I believed that good physicians had answers.

I imagined that experience would eventually erase uncertainty, that with enough years of practice the difficult cases would become less difficult and the unknowns would gradually disappear. I assumed that expertise meant reaching a point where confidence came naturally because there was always a diagnosis to make, a treatment to recommend, or a plan to follow.

Medicine taught me something different.

The longer I have practiced, the more I have come to appreciate the limits of certainty. Every physician, regardless of specialty or years of experience, eventually encounters questions that cannot be answered immediately. Some diagnoses reveal themselves only over time. Some treatments fail despite being evidence based. Some symptoms remain unexplained despite exhaustive investigations. Some patients ask questions for which medicine has no satisfying response.

Yet our profession often makes uncertainty feel like failure.

Long before we become attending physicians, we absorb an unspoken lesson. We learn to value confidence. We present cases with conviction. We answer questions quickly during rounds. We hesitate before admitting that we are unsure because uncertainty can feel indistinguishable from incompetence. Somewhere along the way, many of us begin to believe that a good doctor should always know.

The reality is far more complicated.

Medicine has never been the practice of certainty. It has always been the practice of probability. We estimate risk, weigh competing diagnoses, interpret imperfect evidence, and make the best decisions we can with the information available. Even the most experienced clinicians spend their careers navigating uncertainty. Experience does not eliminate it. It teaches us how to live with it more honestly.

Patients, however, often arrive hoping for certainty.

They want to know why they are suffering. They want reassurance that treatment will work, that recovery is coming, that everything will return to the way it was before. As physicians, we want to offer that reassurance. We want to relieve not only symptoms but fear itself.

Sometimes we can.

Sometimes we cannot.

Those moments can be deeply uncomfortable. Faced with uncertainty, it is tempting to fill the silence with premature conclusions or to speak with more confidence than the evidence truly allows. Not because we wish to mislead, but because uncertainty feels uncomfortable for everyone in the room.

I have come to believe that patients are often more comfortable with uncertainty than we imagine. What they struggle with is feeling abandoned by it.

There is a profound difference between saying, "I don't know," and saying, "I don't know, but I will keep working with you to find the answer."

One closes a door.

The other opens one.

The words "I don't know" are not an admission of defeat. They are an acknowledgment of reality. They remind patients that medicine is practiced by human beings rather than by people who possess perfect knowledge. More importantly, they create space for honesty, curiosity, and partnership.

Trust is rarely built through certainty alone.

It is built when patients believe that their physician is listening carefully, thinking thoughtfully, and willing to remain present even when the path forward is unclear. In many cases, they remember less about the exact words we used than how we made them feel while navigating uncertainty together.

Some of the most meaningful moments in medicine occur not when we have immediate answers, but when we stay present despite not having them.

As a psychiatrist, I encounter this often. A patient may ask how long recovery will take. Whether a medication will finally help after years of disappointment. Whether they will ever feel like themselves again. I cannot honestly promise outcomes that none of us can predict.

What I can offer is my attention, my experience, and my commitment to walk alongside them through the uncertainty.

That commitment matters.

There is another side to uncertainty that physicians do not always discuss. Admitting we do not know something requires vulnerability. It asks us to set aside the image of the physician as someone who is expected to have every answer. It reminds us that expertise is not measured by omniscience but by judgment, humility, and the willingness to keep learning.

Perhaps that is why these three words can feel so difficult to say.

Yet they may also be among the most important.

The longer I practice, the less I see medicine as a profession built upon certainty. Instead, I see it as a profession built upon relationships. Our patients do not need us to know everything. They need us to be honest about what we know, transparent about what we do not, and committed enough to continue searching when the answers are not immediately apparent.

Confidence has its place in medicine.

So does humility.

The two are not opposites. In fact, they often strengthen one another. A physician who can acknowledge uncertainty without losing compassion demonstrates a different kind of confidence, one rooted not in having every answer, but in being willing to face the unknown with integrity.

Perhaps the quiet courage of medicine is not found in always knowing.

Perhaps it is found in having the humility to say, "I don't know," and the compassion to add, "But I am here, and we will figure this out together."

Devin Maya Wadhwa, MD, FRCPC is a psychiatrist practicing in Northern Ontario, Canada, and an Assistant Professor at NOSM University.