Campbell presents an eye-opening look at the latest research on how our feelings do not come from what has happened to us, or past events in our lives, or the relationships we have. They come from our beliefs about what has happened to us, and the beliefs about those events, and our beliefs about those relationships. When you change those beliefs, your feelings follow.

When this was posited back in 1962 in one of the first books on cognitive psychology, A Guide to Rational Living, it changed psychology forever. It argued that we can affect how we feel about ourselves, and about our lives and loved ones by changing our beliefs. Campbell shows how.