Two quotations from the same sermon made me stop and think. The preacher was called Jim Roberts, speaking at St Michael le Belfrey in York (podcasts available through iTunes).
"We are all the best Christian somebody knows... because we are the only Christian somebody knows!"
"We get persecuted for the message of Christianity, not for being stupid! There is a world of difference, although some Christians don't realise that."
Now put them together... Hmmm!?!