Chapter 2: Why Good Days Don’t Last

After A Very Good Day

The day arrived as usual and everything went right without warning, which is usually how these things happen. I woke up before my alarm, rested but not smug about it. The light in the room was the good kind—soft, forgiving, not too bright. My phone had no new messages asking for explanations or apologies. The weather app said it would be mild, and for once it was correct.

Nothing extraordinary happened. That was the remarkable part.

I made coffee and didn’t spill it. I found my keys on the first try. The train arrived when it was supposed to, which felt almost suspicious. At work, the meeting ended early. Someone laughed at a joke I hadn’t rehearsed. An email I’d been quietly worried about turned out to be fine. Better than fine, actually.

By mid-afternoon, I noticed myself noticing. This is always the danger point. Once you become aware that things are going well, you begin to treat it like a fragile arrangement, something that could be revoked at any moment. I moved carefully through the rest of the day, as if I might jinx it by acknowledging it too loudly.

On the way home, I bought myself a pastry I didn’t need. I ate it slowly, standing on the sidewalk, crumbs collecting in the crease of the paper bag. It tasted better than it should have. I felt briefly, almost sheepishly, lucky.

That evening, sitting on the couch, I reviewed the day the way one might review a movie they enjoyed but didn’t fully understand why. I felt lighter. Calmer. More capable. I thought, not for the first time, Maybe I’ve finally figured things out.

This thought did not last.

The next morning was fine. Perfectly fine. Nothing went wrong. Nothing went especially right either. The coffee tasted ordinary. The train was a little crowded. Work unfolded as expected. By late afternoon, I felt a vague disappointment I couldn’t quite justify. It took me a while to realize what I was reacting to. Not failure. Just contrast.

The problem with a very good day is not that it ends. It’s that it quietly recalibrates your expectations. What felt like ease becomes the new standard. Anything less begins to register as loss. I have done this my whole life. I suspect most people have.

When something unusually good happens—a compliment, a stretch of productivity, a feeling of closeness—I start to believe, without quite admitting it, that this is how things should be now. That the line has shifted upward. When it drifts back down to where it usually lives, I feel wronged.

But nothing has been taken from me. I’m just back where I started.

There’s a term for this, though I didn’t learn it until later: regression to the mean. Extreme outcomes, good or bad, tend to be followed by more typical ones. The peak is not sustainable. Neither is the valley. Over time, things return to average. This is not an exciting idea. It doesn’t promise improvement. It doesn’t reward effort directly. It simply describes gravity.

Figure 3: Regression to the Mean (The Stabilizing Force)

I used to resist it. I wanted my good days to mean something permanent. I wanted them to be proof of progress, evidence that I was getting better at life. When they faded, I took it personally, as if I’d failed to maintain something I’d earned. I did the same with bad days, too, though in a different way. One difficult week could convince me that I was declining. That something had slipped. That I was headed in the wrong direction.

Both interpretations were wrong, just in opposite ways.

Most of my days are unremarkable. They fall somewhere in the middle. This is not a complaint. It’s a description. I wake up. I do what needs to be done. I get tired. I eat dinner. I watch something mildly distracting. I go to bed. These days don’t announce themselves. They don’t make for good stories. They don’t produce clear lessons. They are, statistically speaking, where most of my life happens.

And yet, I spend an outsized amount of energy interpreting the exceptions.

When I feel unusually confident, I start planning as if that confidence will be available on demand. I say yes to things I would normally hesitate over. I imagine a version of myself who has permanently upgraded. When I feel unusually low, I start pulling back. I cancel plans. I lower expectations. I tell myself I’m being realistic, when in reality, I’m responding to a temporary dip. In both cases, I mistake a fluctuation for a trend.

I see this pattern in others too, though it’s easier to notice from the outside. A friend has a great run at work and starts to believe they’ve finally cracked the code, only to feel disoriented when the next project stalls. Another friend has a string of rejections and begins to question their entire path, even though nothing fundamental has changed.

We comfort each other by saying things like, “You’re just having a week,” or “You were due for a break.” These phrases are truer than they sound. They acknowledge the swing without assigning it too much meaning.

Still, when it comes to ourselves, we’re less forgiving. We expect consistency from our moods, our performance, our relationships. We treat deviation as diagnosis. I remember once finishing a project that had consumed me for months. It went well. People were pleased. I felt competent in a way that was rare and intoxicating. For a few days afterward, I floated. Then, inevitably, the feeling faded. I sat down to start something new and felt clumsy, unsure. My first thought was that I had lost something. My second was that I had fooled everyone the first time. Neither was true. I was simply back to normal, which only felt like loss because I’d been somewhere else.

There’s a quiet cruelty in how we narrate these returns. We call them slumps. We frame them as failures to sustain excellence. We forget that excellence, by definition, is exceptional.

Most of us are not meant to live at our peaks. Peaks are landmarks, not residences. Understanding this has softened some of my harsher self-judgments. Not eliminated them—I’m not that enlightened—but softened them. When I notice myself mourning the absence of yesterday’s ease, I try to ask a gentler question: What is normal here? Normal is not glamorous. Normal includes fatigue. Normal includes distraction. Normal includes days that don’t add up to much. Normal also includes quiet competence, small kindnesses, tasks completed without fanfare. These things don’t spike the graph, but they hold it steady.

There’s relief in letting good days be gifts instead of promises. In enjoying them fully without demanding that they repeat. There’s relief, too, in letting bad days be what they are—temporary deviations, not forecasts.

I still catch myself bargaining with the universe after a particularly smooth stretch. If things could just stay like this, I think. As if staying were an option. But life doesn’t work that way. It oscillates. It wobbles. It moves around a center that’s less exciting than we’d like, but more stable than we fear.

Once, after a run of unusually productive mornings, I rearranged my schedule to match that energy. I signed up for early meetings. I committed to deadlines that assumed clarity and focus. When the energy receded—as it always does—I blamed myself for not maintaining it. Now I try to plan for the average version of myself. The one who needs reminders. The one who gets tired. The one who sometimes struggles to begin. This version is not broken. It’s representative.

There’s a kindness in designing a life that fits your typical capacity rather than your best-case scenario. It leaves room for rest. It allows for recovery. It doesn’t punish you for returning to baseline.

I’ve started noticing how often culture celebrates sustained highs without acknowledging the machinery behind them. We praise consistency as if it’s purely a matter of will. We treat burnout as a surprise rather than a predictable outcome. Regression to the mean is not a failure of discipline. It’s a feature of being human.

This doesn’t mean effort is meaningless. It means effort operates within limits. You can influence the average over time—slowly, gradually—but you can’t abolish variation. Some days will still rise above the line. Others will dip below it. Neither requires a rewrite of your story.

When I think back to that very good day—the easy morning, the smooth conversations—I try now to remember it accurately. Not as evidence of a permanent shift, but as a moment of alignment. A reminder of what’s possible, not a demand. The next day didn’t need to match it. It only needed to be itself. There’s a subtle freedom in accepting this. It takes pressure off joy. It lets happiness arrive without forcing it to justify its existence. And it changes how I interpret disappointment. Instead of asking, what went wrong? I’m more likely to ask, what was I expecting? Often, the answer is: too much continuity.

As I’ve grown more aware of these patterns, I’ve become curious about another habit that shapes how I experience uncertainty. Not how I react to highs and lows, but how I interpret new information altogether—how the past sneaks into the present, coloring my expectations before I even realize it.

Because even when I know that today is just today, I still carry yesterday with me. Old experiences whisper predictions. History leans forward, trying to explain what comes next. And that, I’ve learned, is a different kind of probability problem entirely—one that has less to do with averages, and more to do with belief.