G.K. Chesterton has to be one of the most quotable people that every existed. You can almost put your finger down at any place in any of his many books, essays, and other writings and come up with a pithy, witty, meaningful quip. So I was pleased to discover that not only are there many sites devoted to Chesterton, but there is an entire site of just his quotes here.
His quotes range from the simply witty ("Misers get up early in the morning; and burglars, I am informed, get up the night before") to the profound ("Women are the only realists; their whole object in life is to pit their realism against the extravagant, excessive, and occasionally drunken idealism of men") to thoughtful truisms ( "The riddles of God are more satisfying than the solutions of man.") In fact, I admit it: I like to quote Chesterton more than I like to read him, as I find him tedious going sometimes. In fact, he's tedious tonight, so I'll just leave you here with a quote that urban planners should heed: "Some people leave money for the improvement of public buildings. I can leave dynamite for the improvement of public buildings." Given that, I'm sure he'd have something to say about the faddishness of the roundabout in traffic planning. In fact, he's probably already said it!