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.

Membership is the church's corporate endorsement of a person's salvation.

I assume that normally the Lord will be bringing people to himself through the instrumentality of the preached word. However, we have to be very careful that we don't assume that if we are 'X' faithful in evangelism, then we will see 'Y' results right now. It doesn't work like that.

By the grace of God I am what I am

God can use even stray, honest comments to bring people to himself.

We do not fail in our evangelism if we faithfully tell the gospel to someone who is not subsequently converted; we fail only if we do not faithfully tell the gospel at all.

I love people thinking about apologetics. I just think that we have to be careful. We need to realize that we can argue about evolution or the existence of God or any number of things, but until we tell people the message of the cross, we have not evangelized them.