There are many people in the world, alas, who are interested in religion, who talk about it and are always ready to have a debate about it. Many of them read books about religion and listen to lectures on the radio about it: perhaps they even listen to sermons in church about religion and are tremendously interested. But it is purely a detached, intellectual interest, something that they like to play with in their minds and to talk about to others. So the point I am making is this: Surely, this is infinitely worse than the position of people who say there is no God. Indeed, is there anything more terrible than a purely theoretical and academic interest in God and in religion and in the godly life?
Martyn Lloyd-Jones (Dead Religion)