Before people have experienced The Work of Byron Katie for themselves, they often think that it is too simple to be effective. But its simplicity is precisely what makes it so effective. Over the past two years, since Katie and I first met (we are now married), I have done The Work many times, on thoughts I hadn’t even been aware of. And I’ve watched more than a thousand people do it in public events across the United States and Europe, on the whole gamut of human problems: from major illnesses, the deaths of parents and children, sexual and psychological abuse, addictions, financial insecurity, professional problems, and social issues, to the usual frustrations of daily life. Again and again, I have seen The Work quickly and radically transform the way people think about their problems. And as the thinking changes, the problems disappear.