"ACT psychology is a psychology of the normal. A lot of the psychologies that are out there are built on the psychology of the abnormal. We have all these syndromal boxes that we can put people in and so forth. The actual evidence on syndromes is not very good. There's no specific biological marker for any of the things that you see talked about in the media. Even things like schizophrenia - there's no specific and sensitive biological markers for these things. There may be some abnormal processes involved, but vastly more of human suffering comes from normal processes that run away from us."