I think that there are many things in the New Testament that show us that the godliness of our conversation plays an important evangelistic role. The apostles are clear that we mustn't limit the explicit sharing of the gospel to formal preaching. It can also happen in ordinary conversations.
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 Dever