Recently I came to realise that my psychological makeup, specifically my OCD, had probably influenced my theology and indeed my vocation quite profoundly. I'm an evangelist, which is a word which means different things to different people, so I'll tell you what it means to me. Being an evangelist means that my principal concern as a Christian minister is for people who don't follow Jesus, and that communicating the gospel or 'good news' to people who haven't heard it a thousand times already is the most important thing I do. My faith has been nurtured in evangelical churches, and it's probably fair to say that evangelicals place a greater emphasis on evangelism than other Christian traditions. That's partly because we emphasise conversion and making a personal decision to follow Christ. In Baptist churches we practise believer's baptism, which means that we only baptise people who have made that personal decision for themselves (which is why ...