I think that the number one reason that Christians do not share the "Gospel" (Good News) is because deep down inside they recognize that the traditional presentation of the "Gospel" (Turn or Burn) is not really "Good News" at all for most of humanity. Traditional "Gospel" - "God loves you, but if you don't turn to Him in obedient faith you're going to burn in Hell forever." That's simply not Good News and no one likes to be the bearer of Bad News. The traditional "Gospel" is also very exclusionary and filled with rejection. And if one considers that most of Christendom believes that there will on be a few saved, and that most of humanity will be forever lost, it seems then that there is far more faith in the certainty of damnation for others, than there is in salvation for others. I mean, why share the "gospel" if you are sure that most people are going to reject the message and you. Maybe we need to rethink our understanding of the "Gospel" and find a really "Good News" message?