Our Lord attracted sinners because He was different. They drew near to Him because they felt that there was something different about Him… And the world always expects us to be different. This idea that you are going to win people to the Christian faith by showing them that after all you are remarkably like them, is theologically and psychologically a profound blunder.
The glory of the gospel is that when the Church is absolutely different from the world, she invariably attracts it. It is then that the world is made to listen to her message, though it may hate it at first. That is how revival comes. That must also be true of us as individuals. It should not be our ambition to be as much like everybody else as we can, though we happen to be Christian, but rather to be as different from everybody who is not a Christian as we can possibly be. Our ambition should be to be like Christ, the more like Him the better. And the more like Him we become, the more useful to the world we will be.
D. Martyn Lloyd-Jones, Preaching and Preachers