"When you're invited to dinner, go and sit at the last place. Then when the host comes he may very well say, 'Friend, come up to the front.' That will give the dinner guests something to talk about! What I'm saying is, If you walk around with your nose in the air, you're going to end up flat on your face. But if you're content to be simply yourself, you will become more than yourself."
Then he turned to the host. "The next time you put on a dinner, don't just invite your friends and family and rich neighbors, the kind of people who will return the favor. Invite some people who never get invited out, the misfits from the wrong side of the tracks. You'll be — and experience — a blessing. They won't be able to return the favor, but the favor will be returned — oh, how it will be returned!— at the resurrection of God's people."
HT to Shane Claiborne for reminding me about this passage, when he writes about it in his massively challenging book, The Irresistible Revolution. I recommend the book - go and read it, but I would avoid it if you want to stay comfortable.