I totally agree about Spock's response in "Amok Time.""If you can't take a little bloody nose, maybe you ought to go back home and crawl under your bed. It's not safe out here. It's wondrous, with treasures to satiate desires, both subtle and gross. But it's not for the timid." -- Q
I loved this...
You beat me to the punch. Possibly my favorite line from TNG.
Another good one, from "Amok Time":
"You may find that having is not so pleasing a thing after all as wanting. It is not logical, but it is often true."