Unfortunately, many of our churches calibrate their life to these nominal Christians. The predictable result is that you get fake, hypocritical churches that confuse the message of the gospel and make it hard for others who are trying to do genuine evangelism.
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 DeverIt's fine to deal with people's doubts and explain why they have good reasons to believe in Christ. But until we tell them the good news of Jesus Christ, we haven't done our job. They need a saviour that God has provided them in Christ. Once they know that, we can do as much apologetics as we need to.
Mark DeverTestimonies are great things about what the Lord has done for us, but no-one will be offended when you talk about what God has done for you. You need to be specific about sin, about Christ's death on the cross, about others' need for a saviour, and about their need to repent and trust in Christ.
Mark Dever