I. M. Pei

I'd been going to the Louvre since 1951. I thought I knew Paris and the French, but I didn't really. You know how easy it is to make friends when you are traveling. People are curious about you, you are curious about them. But you never really make friends that way. After the Louvre, I discovered that I have friends now because I have enemies.

One thing I learn - I've been in practice now for half a century or more, and the most important ingredient for an architect to do a good building is to have a good client. I think a client counts for as much as fifty per cent.