Genius hath electric power which earth can never tame. — Lydia M. Child. American abolitionist, author, and activist (1802–1880) Genius
Over the river and through the wood, To grandfather's house we go; The horse knows the way To carry the sleigh, Through the white and drifted snow.
You find yourself refreshed by the presence of cheerful people. Why not make an honest effort to confer that pleasure on others? Half the battle is gained if you never allow yourself to say anything gloomy.