EDIT: I don’t think I conveyed what I meant well enough in the post. I was talking about something like, say, reading. It’s my favorite hobby. If I was forced to never read again, I’d be absolutely miserable. But if I completely forgot about reading, there wouldn’t exactly be anything to miss.
I think one should remember the happy moments to know what’s possible. If you’ve been there before, the place exists and you can get there again.