A person can learn a lot from a dog . . . about living each day with unbridled exuberance and joy, about seizing the moment and following your heart . . . to appreciate the simple things - a walk in the woods, a fresh snowfall, a nap in a shaft of winter sunlight . . . optimism in the face of adversity. Mostly, about friendship and selflessness and, about all else, unwavering loyalty. — John Grogan, Marley and Me