"Over the years I have come to know and know of many ex-Christians, most of whom were well-churched, their numbers including former ministers, apologists, missionaries, theologians etc. Why should such people leave Christianity? These people are the best versed in Christianity and yet leave despite so much personal and professional investment in their religion, enjoyment of their time as believing Christians and social pressures to stay. How can this happen if the evidence for Christianity is so good? If Christianity is true, shouldn't they have known better?"
The above quote is taken from one of the many websites for ex-Christians. The author is a former member of a "moderately high Anglican church" and his words prompt the question: Why do so many sincere Christians leave Christianity?