When you need a quote from GKC for a particular day, you get out Michael W. Perry's excellent Chesterton Day by Day, an indispensable tool in a Chestertonian's toolbox. Unfortunately, today's quote is too long for me to key-in, so I'm just going to hit the highlight:
"Empires break; industrial conditions change; the suburbs will not last forever. What will remain? I will tell you: the Catholic saint will remain."
From The Ball and the Cross.