We tend to use the words change and uncertainty as though they describe the same experience. In conversation they’re almost interchangeable. But the more I observe people moving through transitions, the more convinced I am that they’re not the same thing at all, and that confusing them causes a great deal of unnecessary self-criticism.
A change, even a hard one, gives us something to work with. There’s a new role to learn, a new routine to build, a new environment to read. It asks a lot of us, but it has a shape. We can orient ourselves around it. Over time, what felt foreign becomes familiar, and we build a sense of normal around the new reality.
Uncertainty is different. It isn’t the new thing. It’s the absence of one. It’s the stretch after a decision has been made but before the path becomes visible. The waiting on a result. The open-ended period after leaving a role. The pause between one chapter ending and the next taking shape. There’s nothing yet to adapt to, because the future hasn’t arrived. And that, it turns out, is its own kind of weight.
I think we underestimate this because uncertainty doesn’t look like much from the outside. Nothing dramatic is happening. No crisis, no obvious demand. And yet people in these stretches describe feeling tired, restless, and unable to settle, often without being able to say why.
There’s a straightforward reason for that, and it sits in our biology.
The nervous system is built to anticipate. It runs slightly ahead of the present moment, constantly forecasting what’s likely to happen next so the body can prepare. When the future is reasonably predictable, this allows us to relax between demands. The system knows roughly what’s coming, so it can ease off. We experience that as feeling settled, even if we never notice the machinery underneath it.
Uncertainty takes away the very thing that machinery depends on. When the future genuinely can’t be predicted, the system has no forecast to rely on, so it can’t decide whether to brace or to rest. It holds a low level of readiness instead, scanning and waiting for information that hasn’t come. That readiness is quiet, but it isn’t free. It’s why waiting can leave us so depleted even when nothing visible is being asked of us.
Once you see this, a familiar pattern starts to make more sense. People who have made entirely sound decisions still feel unsteady for months afterwards. Military veterans who were ready to leave service struggle with the open-ended period that follows. Women navigating a health change feel exhausted by the waiting itself, long before anything has been resolved. None of this is a failure of resilience. It’s a system responding exactly as it was designed to respond to an unresolved future.
I find this matters most because of what people do with the discomfort. Capable people, in particular, tend to turn it on themselves. They assume that because the decision was right, they should feel fine. When they don’t, they conclude they’re coping badly. The fatigue becomes evidence of personal weakness, when in fact it’s evidence of a normally functioning nervous system meeting conditions it can’t yet rest in.
Naming the difference between change and uncertainty offers a gentler interpretation. It lets us stop asking why we haven’t settled, as though settling were a matter of will, and recognise instead that we’re in a state the body finds inherently costly. The discomfort isn’t a sign we’ve gone wrong. It’s a sign we’re human, sitting in a gap that hasn’t closed yet.
That reframe doesn’t make uncertainty pleasant. But it does change the relationship we have with it. Instead of treating the in-between as a test we’re somehow failing, we can treat it as a place we’re passing through, one the body will leave as soon as it has enough information to predict its way forward again.
When you think back to your own transitions, was it the change that was hardest, or the waiting around it?
