Is it a commentary on television that nowadays some of the best programs are the commercials? One of my all-time favorites was made by the Aetna Insurance Company. It shows a father going through a goodnight ritual with his young son. First, the father has to look under the bed and then check the closet to make sure no monsters are there. Then, having secured the room, he says goodnight. As he leaves the room, a shaky little voice says, "Dad, would you leave the hall light on?" All of us can relate to that little boy. Even big people are attacked by the demons of anxiety, panic, and depression. Writing recently in Time magazine, Dr. Robert Wright noted that 15 percent of Americans have had a clinical anxiety disorder. In some industrialized societies, the rates of depression have been dou…