Here's a wonderful site full of GK Chesterton quotes.

Here are a few that struck me with giggles and/or joy:

The word "good" has many meanings. For example, if a man were to shoot his grandmother at a range of five hundred yards, I should call him a good shot, but not necessarily a good man.

A room without books is like a body without a soul.

Art consists of limitation. The most beautiful part of every picture is the frame.

And so on.