Perhaps more
dramatic illustrations are found in hospital wards where a visitor's warm «hello» turns on the light, opens the shutters, straightens the linens, and brightens the faces; or in rural America where a major business transaction is sealed by one man
giving his word to another; or in the quiet guidance of Anne Sullivan who with the one word «water» brought Helen Keller into the world of human experience; or in the nation - shaping speeches of Adolf Hitler and Winston Churchill.