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 DeverLet's say you don't want to stress the urgency of the gospel. Imagine that you are a hyper-Calvinist, and you just figure that people's salvation is a matter for the sovereignty of God. Well, if that's the case, there will never be the heartfelt pleading that you would see in a Spurgeon or an Edwards, or in the Apostle Paul where he pours out his heart in Romans 9 and 10 for the Jewish people.
Mark DeverI think that honesty in presenting the gospel goes out the window when you want people to respond to the message, but you are prepared to accept any sort of response. Of course, the only true response is heartfelt repentance and faith. However, if you don't feel the need to be honest in your presentation, then you will calibrate your presentation of the gospel to whatever gets the response you want.
Mark Dever