Never let a good crisis go to waste is usually said with a cynical wink, the slogan of politicians and executives who see an emergency as cover for whatever they wanted to do anyway. But strip away the opportunism and there is a version of the idea grounded in psychology that applies to ordinary lives. A crisis, an illness, a job loss, a breakup, a sudden scare, does two things at once. It hurts, and it disrupts. The hurting is the part everyone notices; the disrupting is the part the phrase is really about, because disruption briefly opens possibilities that ordinary stability keeps firmly shut. What it warns against is not failing to profit from suffering, but letting that opening close and snapping back to the old default without using it. Two lines of research explain why the opening is real, and also why it should be handled with care.

A crisis loosens the grip of habit

Most of what we do runs on autopilot, and that autopilot is anchored to a stable context. The psychologist Bas Verplanken has described what he calls the habit discontinuity hypothesis: because habits are cued by the settings and routines around us, a major disruption to that context temporarily weakens them and opens a window in which behavior is more consciously considered and people become more open to new choices.

This is why so much real change happens in the wake of upheaval rather than during calm stretches. When a move, a new job, or a health scare shatters the routines that normally run your days on rails, the automatic behaviors lose their footing, and for a while you are actually deciding rather than merely repeating. A crisis does this forcibly and all at once, which is exactly why it is such a potent moment for change. The catch is that the window is temporary. Habits reassemble quickly around whatever you do next, so if you drift through the disruption and let the old routine simply resume, it will, and the opening closes. Not wasting a crisis, in this sense, means using the brief period when your life is genuinely movable to choose, on purpose, what the new normal should be before it sets again.

Adversity can force a genuine reassessment

The second line of research concerns not habits but meaning, and it needs to be reported carefully because it is easily oversold. Richard Tedeschi and Lawrence Calhoun documented what they termed post-traumatic growth, the positive changes some people experience while struggling with a major crisis, including deeper relationships, clearer priorities, a greater sense of personal strength, and a sharpened appreciation of life.

The honest version of this finding comes wrapped in caveats, and they matter. Post-traumatic growth is not a claim that crises are good or that growth is inevitable; it coexists with real and lasting distress, tends to unfold slowly over years rather than days, and, most importantly, researchers have found that much of the growth people report is a coping narrative that does not match measurable change in how they actually function. So the defensible reading is a modest one. A crisis can, for some people, deliver a jolt that forces a real reassessment of what matters, cutting through the assumptions that comfortable stability lets us leave unexamined. But that reassessment only becomes growth if it is acted on rather than merely felt and retold. The crisis supplies the clarity; it does not supply the change.

How to not waste one, without romanticizing it

Put the two together and the practical shape of the advice appears. A crisis simultaneously loosens your habits and can prompt you to reconsider your priorities, and those two effects rarely align at any other time. Not wasting one means using that temporary alignment deliberately: while the window is open, naming what the disruption has clarified, what you will drop, start, or change, and taking concrete action on it quickly, because the pull back toward the old routine is strong and the opening is short.

It is essential to say plainly what this is not. It is not a reason to welcome or romanticize suffering. Crises cause genuine harm, most of what they bring is not opportunity, and someone in the acute pain of one owes themselves care and support first, not a self-improvement project. The window is real but small, and it can just as easily entrench fear and bad patterns as open the way to better ones; disruption makes change possible, not necessarily good. Don’t waste a crisis is therefore best heard not as the glib instruction to make lemonade, but as a sober observation about timing: a crisis is one of the few moments when a life is actually movable rather than fixed. The waste is not in failing to feel grateful for the pain. It is in letting a rare and fleeting chance to change direction pass unused, and finding, once things have restabilized, that everything has quietly snapped back exactly as it was.