What the Stoics Said About Regret

Regret is the mind replaying a decision it can no longer influence. The Stoics did not deny that people make mistakes. They denied that dwelling on a closed chapter does anything useful with the time left to you.

The past is not in your control

The entire Stoic framework starts with the dichotomy of control: some things are up to us, some things are not. A decision you made five years ago is now in the second category. You cannot revise it. You can only act differently now. Epictetus states the principle bluntly:

"Men are disturbed not by the things which happen, but by the opinions about the things."

Translation: Elizabeth Carter, Enchiridion

Regret is an opinion layered onto a fact. The fact is "I made choice X." The opinion is "and therefore I am still being punished for it, right now, in this moment, which is otherwise fine." That second part is optional. Most people don't notice they've added it.

Seneca on wasted time

Seneca's entire treatise On the Shortness of Life is partly about this exact failure mode: spending present time servicing past time. He writes:

"It is not that we have a short time to live, but that we waste a lot of it."

Translation: C.D.N. Costa, On the Shortness of Life

Regret is one of the primary ways people waste it. You cannot get the original moment back by suffering about it later. The suffering does not retroactively improve the decision. It just adds a second loss on top of the first one, except this loss is happening today, when you actually have agency.

Seneca makes a related point in his letters, where he treats self-examination as useful only when it's forward-looking:

"I will keep constant watch over myself and — most usefully — will review each day. For this is what makes us wicked: that none of us looks back over his own life. We think about what we are going to do, and only rarely of that too, but do not think about what we have done."

Translation: Robin Campbell, Letters to Lucilius

Note what Seneca recommends here. Not regret. Review. The difference matters. Review extracts a lesson and closes the file. Regret reopens the file nightly and reads it again without extracting anything new.

Marcus Aurelius and the sunk decision

Marcus, writing to himself rather than for an audience, returns constantly to the idea that only the present moment is actually available to act in:

"Confine yourself to the present."

Translation: Gregory Hays, Meditations

He also reminds himself, in the spirit of memento mori, that dwelling on what cannot be changed is a poor use of a life that is already short and uncertain. The emperor had plenty to regret, politically and personally, and his private notebook is notable for how little space he spends on it. He spends his pages on what to do next.

The mistake itself is not the problem

Here the four virtues become relevant. Wisdom includes the ability to judge correctly, which means a Stoic will sometimes judge wrongly and discover this later. That is not a scandal. It is what learning looks like from the inside. Epictetus again, more sharply:

"It is the act of an ill-instructed man to blame others for his own bad condition; it is the act of one who has begun to be instructed, to lay the blame on himself; and of one whose instruction is completed, neither to blame another, nor himself."

Translation: George Long, Discourses

That last stage is the target. Not denial of fault, and not endless self-blame, but a clean accounting: here is what happened, here is what I'll do differently, moving on. The discipline of assent is the tool for this. It is the practice of examining an impression, in this case "I should feel bad about this indefinitely," and declining to automatically agree to it just because it arrived.

A practical method

When regret shows up, the Stoic move is roughly:

1. Name the actual decision, without embellishment. Not "I ruined everything," but the specific choice.
2. Extract the one or two things it actually teaches you about how you reason or act under those conditions.
3. Decide what you would do differently, concretely, if the situation recurs.
4. Stop. Anything past this point is rehearsal of pain with no new information attached.

This is not about suppressing feeling. It's about noticing when a feeling has stopped doing any work. Grief over a mistake has a function early on. Carried past that point, on a loop, for years, it has none. Amor fati applies here too: not pretending the mistake was good, but accepting that it is now a fixed part of the sequence of events that produced the person currently capable of doing better.

Regret feels like responsibility. Often it is closer to its opposite, a way of appearing to take the past seriously while avoiding the harder work of acting differently today.

Related: How to Apply Amor Fati

Sources: Epictetus, Enchiridion (trans. Elizabeth Carter); Epictetus, Discourses (trans. George Long); Seneca, On the Shortness of Life (trans. C.D.N. Costa); Seneca, Letters to Lucilius (trans. Robin Campbell); Marcus Aurelius, Meditations (trans. Gregory Hays)