In his book, Joy Unspeakable, Martyn Lloyd-Jones notes:
I am certain that the world outside is not going to pay much attention to all the organized efforts of the Christian church. The one thing she will pay attention to is a body of people filled with the spirit of rejoicing. That is how Christianity conquered the ancient world. It was this amazing joy of these people. Even when you threw them into prison, or even to death, it did not matter, they went on rejoicing; rejoicing in tribulations.
Perhaps we would be wise to recover this attitude. It seems to me, many of our contemporaries spend too much energy griping about the world, and about lessened stature in the estimation of the culture. But if we recover the joy that should be an inherent attribute of our faith, perhaps we can regain our effectiveness as redeeming and preserving agents in this world.