If you have only one smile in you, give it to the people you love. Don't be surly at home, then go out in the street and start grinning 'Good morning' at total strangers.
He appeared to enjoy beyond everything the sound of his own voice. I couldn't wonder at that, for it was mellow and full and gave great importance to every word he uttered. He listened to himself with obvious satisfaction and sometimes gently beat time to his own music with his head or rounded a sentence with his hand.
Confront a child, a puppy, and a kitten with a sudden danger; the child will turn instinctively for assistance, the puppy will grovel in abject submission, the kitten will brace its tiny body for a frantic resistance.