I love Iain Murray's definition of worldliness: towards the end of Evangelicalism Divided, he says that worldliness consists of loving idols and being at war with God. I think that's true in the lives of too many professing Christians today.
Mark DeverWorldliness in the church is a lot more pervasive than a lack of passion for evangelism. Nevertheless, one of the results of worldliness is a waning enthusiasm for evangelism.
Mark DeverI think many people in the church are probably concerned that they can't answer all the questions that might come up. I am sure this affects people by playing on their doubts - especially if they have their own questions that they are wrestling with.
Mark DeverThe difference between apologetics and evangelism is that in apologetics, you are answering objections that the world raises, whereas in evangelism, you are bringing the message that Christ brought. So unbelievers tend to set the agenda in apologetics, and you set the agenda in evangelism.
Mark Dever