What does it mean to be rich?

Trent from the Simple Dollar talks about it in terms of abundance and scarcity, but I like Oleg's take better:

"Sometimes, I am rich. Not always, but I was rich yesterday. I had more of what I wanted than I actually needed — my sole constraint being the 24/7 limit of available time shared by all. I had more storage capacity in the camera and props than I could photograph in a day, more ammunition than I could shoot in the range time I have, more perfectly ripe watermelon and fancy chocolate than I could eat, more good friends than I could see all at once or in turn."