The following quotation has really made me think:
"Watch out for the signs of a dying Christian life. Ask yourself, Am I sharing my faith? Do I have only Christian friends? Do I hang around the dead, the diseased, and the lost? If you and the members of your church have forsaken your duty to reach back into the world, I can promise you your church will start to divide, to backbite, and to fight over nonessential Chrtian issues like hymnal selection and carpet colors. You will become keepers of a Christian aquarium instead of fishers of men. Your church will be on the way to spiritual death. In fact, I can prophesy in any church or to any believer without fear of being in error that if you choose not to evangelize, individually or collectively, your church will fossilize."
--William Fay in Share Jesus Without Fear