Byron Katie is an American speaker and author who teaches a method of self-inquiry known as "The Work of Byron Katie" or simply as "The Work". The Work is a way of identifying and questioning any stressful thought. It consists of four questions and a turnaround. This is a way of experiencing the opposite of what you believe. The four questions are: 1) Is it true? 2) Can you absolutely know that it's true? 3) How do you react, what happens, when you believe that thought? and 4) Who would you be without that thought?