In Sunday's sermon I'll be reading from a blog I read about the above question.  Interestingly the man writing the article claimed to be a "Christian."  He wrote, "We are, in the big big picture, insignificant beings floating in insignificance in a universe that is vast beyond human comprehension."  A "Christian" is a follower of Christ so there is no way that the man who wrote that blog can be a Christian.  He might be "saved" (but I doubt it), but he is certainly not a "follower of Christ."  That may sound judgmental to you but there is no way we can read the Sermon on the Mount ("The Manifesto of the King") and arrive at the conclusion that we are "insignificant beings floating in insignificance."  There was a Latin phrase of the first century that went something like this "There is nothing more valuable than sun and salt."  Jesus is the smartest teacher of all time and knew how to contextualize truth to His audience.  Probably with that phrase in mind, Jesus said to this humble band of followers on the hill, "You are the salt of the earth...You are the light of the world."  That does not sound insignificant to me!  In fact, it makes perfect sense in light of the rest of the Scriptures to believe that Jesus was promoting the value and significance of these "blessed ones."  In writing about this paragraph (Matthew 5:13-16), John MacArthur noted that the key emphasis of these metaphors is the subject of "influence."  God didn't take us straight to Heaven when we believed because we have a role to play in the earth today.  We are here to be a perserving, life-enhancing, light-giving force for the glory of our Dad in the heavens.  Give that some thought the next time you think you are a "nobody."