I read David W. Fagerberg's The Size of Chesterton's Catholicism many years ago (it was published in 1989 by the University of Notre Dame Press):
Now Fagerberg has a new book about Chesterton, this time from Emmaus Road Publishing, and he writes in First Things about Chesterton and happiness:
The happiness that pervades every word Chesterton writes is occasioned both by things and by people. In his hands, as in the hands of an artist, something is done to the ordinary world that enables the viewer to see its landscape and its citizens anew. “At the back of our brains, so to speak, there was a forgotten blaze or burst of astonishment at our own existence,” he said. “The object of the artistic and spiritual life was to dig for this submerged sunrise or wonder; so that a man sitting in a chair might suddenly understand that he was actually alive, and be happy.” To Chesterton, all things appear as wonderful parts of a thrilling fairyland. He retains an innocent, original delight in things instead of succumbing to the monotony that assails most of us as we grow older.
Read the rest there.