Regret over past decisions, replaying choices you wish you had made differently and imagining how things might have been, is a heavy and common form of suffering. Whether it is a course you chose, an opportunity you missed, time you feel you wasted, or something you did or failed to do, the pain of regret can linger and quietly weigh on your present. Learning to process it in a healthy way is important, because you cannot change the past, but you can change your relationship with it.
A crucial first realisation is that you made past decisions with the knowledge, maturity, and circumstances you had at the time, not with what you know now, so judging your past self by your present understanding is unfair. What looks like an obvious mistake in hindsight often was not obvious at all in the moment, and you did the best you could with who you were then. Extending some compassion to your past self, rather than harshly condemning them, is both fairer and more freeing. It also helps to recognise that the imagined better path you regret missing is not guaranteed to have turned out as you picture, since we tend to idealise the road not taken while forgetting it had its own risks and downsides.
Beyond that, the healthy use of regret is to learn from it and then release it, rather than to punish yourself indefinitely. If a past decision holds a genuine lesson, take that lesson forward into better future choices, which is the one constructive purpose regret serves. But endlessly ruminating on what cannot be changed only steals your present and future without helping anything. Practise accepting that the past is fixed and turning your energy toward what you can influence now, since your present choices shape your future far more than your past ones bind it. Remember too that life is long and paths can be redirected, so many things you regret can still be addressed, improved, or made irrelevant by the road ahead. Where regret is deep and persistent and weighs heavily on you, talking to someone you trust or a counsellor can help you process it. Making peace with the past, by forgiving your past self, taking the lessons, and refocusing on the present, is what frees you to live forward rather than remaining trapped in a story you can no longer edit.
Example: Someone regretting a past choice can recognise they decided with what they knew then, take any genuine lesson forward, and refocus on the present, rather than punishing themselves over a past that cannot be changed.
One practical tip: Judge your past self by what they knew then, not by hindsight, and extend them compassion. Take any real lesson forward, then release the rest, since ruminating on what cannot change only steals your present, while your present choices shape your future more than your past binds it.