It takes no effort to miss the friends we didn't make and the work we didn't do the people we didn't do and the people we didn't marry and the children we didn't have. It is not difficult to see yourself through the lens of other people, and to wish you were all the different kaleidoscopic versions of you they wanted you to be. It is easy to regret, and keep regretting, ad infinitum, until our time runs out.

But it is not lives we regret not living that are the real problem. It is the regret itself. It's the regret that makes us shrivel and wither and feel like our own and other people's worst enemy.

We can't tell if any of those other versions would have been better or worse. Those lives are happening, it is true, but you are happening as well, and that is the happening we have to focus on.

— Matt Haig