Earlier quoted context omitted.
Bluntly, every person I know who's expressed these kinds of sentiments is guilty of the same mistake: externalizing their happiness. They inevitably move, only to find the new place they're in sucks, just in different ways. Or they find another job, but just discover more things they hate there. Or they find a new partner, only to discover a new set of annoyances. The same psychology leads people to think they'll be…
> I think I'm old enough now to confidently say that, yes: Happiness really does start from within. What does age have to do with it? You're one person. It's anecdotal data. I'm old enough now (5 years later) to confidently say that, yes: Quitting my last job really did make me happier.
I don’t want to speak for the OP, but I think they’re using age as a proxy for “I’ve seen this same pattern enough times to…”