James provided an invigorating guide to how to talk to people with bad opinions. And yet the question he always gets asked is 'If you're so sure about everything, haven't you ever changed your mind?'. In an age of us vs. them, tribal loyalties and bitter divisions, the ability to change our minds may be the most important power we have. In this intimate, personal book, James's focus shifts from talking to other people to how you talk to yourself about what you really think. Ranging across a dazzling array of big topics, cultural questions and political hot potatoes, James reveals where he has changed his mind, explains what convinced him, and shows why all of us need to kick the tyres of our opinions, check our assumptions and make sure we really think what we think we do.