The people who radiate a permanent joy have given themselves over to lives of deep and loving commitment. Giving has become their nature, and little by little they have made their souls incandescent. There’s always something flowing out of the interiority of our spirit. For some people it’s mostly fear or insecurity. For the people we call joyful, it’s mostly gratitude, delight, and kindness.
-David Brooks, The Second Mountain: The Quest for a Moral Life
(Hat Tip: Anderson Layman)