Have you ever noticed how we treat our past selves like strangers? We look back at choices we made five years ago—or five months ago—and wonder, What was I thinking?

I felt this acutely last week while clearing out old boxes. I found a letter I'd written to a friend but never sent, full of convictions I no longer hold. Reading it felt like overhearing someone else's conversation. The person who wrote those words is me, technically, but also fundamentally not-me. Every cell in my body has been replaced since then. My knowledge has expanded, my relationships have shifted, my priorities have transformed.

This raises an uncomfortable question about regret: When we regret a past decision, who exactly is doing the regretting? The present self judges the past self by standards the past self couldn't have possessed. We know now what we couldn't have known then. We are different people, equipped with different information, living in different circumstances.

Consider the job you didn't take, the relationship you ended, the city you left. When you imagine the alternate timeline, you're not really picturing that version of you living that life. You're imagining current you, with all your current wisdom and preferences, magically transported back. But that's not who made the choice. That person—your past self—acted reasonably given what they knew and who they were.

This doesn't mean our choices don't matter. They matter immensely. Each decision shapes who we become. But perhaps regret misleads us. Perhaps what we call regret is actually recognition—the acknowledgment that we've grown beyond who we used to be. The discomfort isn't evidence of a mistake; it's evidence of change.

If you can't regret a choice your past self made with their knowledge and context, what does that mean for the choices you're making right now? How does knowing your future self will be a stranger change what you decide today?

#philosophy #identity #regret #change