It's interesting to leave a place, interesting even to think about it. Leaving reminds us of what we can part with and what we can't, then offers us something new to look forward to, to dream about.
“Let's say a Soviet exchange student back in the '70s would go back and tell the KGB about people and places and things that he'd seen and done and been involved with. This is not really espionage; there's no betrayal of trust.”