I've spent much time sharing my Christian faith with a friend who always dismissed me with, "You Christians think that you have THE answer, but you only have PART of it. And Muslims have part, and Hindus have part, and atheists... You know, it's like the old story about the four blind men that touched various parts of an elephant and thought they knew it ALL!"
There's only one problem, my friend: there WAS an elephant (TRUTH!) And (whether you believe it or not) Jesus is IT!
Maranatha!