It is generally believed that the world is made up of two kinds of people: pessimists who see the proverbial glass half empty and optimists who see the glass half full. But there is actually another group of people who often go unmentioned: those who donâ€t see the glass at all. As Thanksgiving rolls around again, Stephen reminds us that true contentment is gained by those who focus not on what is inside the glass . . . but on Who is holding the glass.