According to the New Testament, the church is primarily a body of people who profess and give evidence that they have been saved by God's grace alone, for His glory alone, through faith alone, in Christ alone.
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 DeverChristians, like everyone else, are prone to be selfish and scared, and wanting others to think well of them. So, although we possess what one part of us knows is the greatest news in the world, we don't act as though it is. Consequently, we share the gospel less than we should.
Mark DeverSome believers are faithful in the way that they live, but at the end of the day, they will not share the gospel with as many people as someone else who has special gifts from God.
Mark Dever