What Regret Actually Is: Getting the Definition Right

Most people treat regret like a problem to be solved or a feeling to be outrun. Neither works particularly well. The Stoics came closest to a useful framework when they distinguished between things within our control and things outside it, arguing that regret for the latter was a form of category error. But even their account leaves something out, because regret is not simply about outcomes. It is about the version of yourself who chose, and what that choice reveals. The philosopher Bernard Williams introduced the concept of agent-regret to capture a specific kind of moral feeling: the distress we experience not just when things go wrong but when our own actions were causally central to the harm, even when those actions were defensible at the time. This distinction matters because it helps separate productive self-examination from the punishing loop that most people call regret but which functions more like self-punishment.

The Two Forms That Cause the Most Damage

Psychologists have documented two primary forms of regret that tend to create lasting distress. The first is action regret — regretting things you did. The second is inaction regret — regretting things you failed to do. Studies consistently find that in the short term, action regrets are more painful. You made a decision, something went wrong, the connection between your choice and the outcome is obvious. But over longer time horizons, inaction regrets dominate. People in their seventies and eighties, when interviewed about regret, talk far more about the conversations they never had, the risks they never took, the paths they walked away from without turning back. This asymmetry has a philosophical explanation. Actions, even failed ones, close a chapter. You tried. You know what happened. Inactions leave the story permanently open — the road not taken stays forking ahead of you indefinitely, and the imagination, which is not constrained by reality, tends to populate that road with everything that might have gone right.

The Stoic Contribution and Its Limits

Marcus Aurelius wrote that the present moment is all we truly have, and much of Stoic practice involves redirecting attention away from the past and toward what can be done now. This is genuinely useful advice against a certain kind of rumination. But taken too far, it becomes a prescription for bypassing the legitimate work that regret sometimes demands. Regret, at its best, is information. It tells you something about what you value, what you wished you had prioritized, where the gap between your stated principles and your actual choices was largest. A philosophy that eliminates regret entirely also eliminates this feedback loop. The healthier version of the Stoic approach is not to suppress the feeling but to extract what it is trying to tell you and then, deliberately, let it inform the present rather than contaminate it. Research from Cornell University on regret and decision-making found that people who could articulate specifically what they regretted — and why — were significantly more likely to make different choices going forward than people who either suppressed regret or were consumed by it. The middle path between denial and rumination turned out to be the most functionally useful.

The Problem of the Unchangeable Past

Here is the philosophical tension that no framework fully resolves: you cannot change what happened. You can reframe it, learn from it, apologize for it, make amends where possible, but the event itself is fixed. This is what makes regret different from worry or disappointment. It is oriented backward toward something with no give in it. Some philosophers argue this is precisely why regret is irrational — it is emotional energy directed at something permanently beyond reach. But this misunderstands how regret functions psychologically. We are not directing the regret at the past hoping to change it. We are using the past as a mirror in which to examine the self that made the choice. The past is fixed; the self that made it is not. Aristotle's concept of practical wisdom, phronesis, is instructive here. The practically wise person is not someone who never regrets but someone who has integrated past errors into a richer and more honest understanding of their own limitations and tendencies. Regret, in this reading, is not the enemy of wisdom but one of its sources.

Living Forward With What You Carry

The most honest philosophical position on regret may be one that holds two things simultaneously: that some regrets are legitimate responses to real moral failures and deserve to be taken seriously, and that prolonged dwelling on the past has diminishing returns that eventually become destructive. This does not mean forgetting or minimizing. It means recognizing that you were, at every moment of your past, the person you had become up to that point — with the information, the emotional resources, the blindspots, and the fears that were present then. Judging that person by who you are now, equipped with everything that came after, is not wisdom. It is a category error wearing the costume of self-awareness. The philosophers got something right: the work of regret is not to undo but to integrate. To carry what happened honestly, to let it sharpen your attention, and then to keep going.