Many non-Christians will ask why Christians are always "hyping" their religion, or trying to convert others. Why can't Christians just keep their faith to themselves?
Well, this is simple really. I'll use an analogy. Lets say Christianity is the Amtrak of life, and as a Christian, I am an Amtrak representative. As a devoted Amtrak representative my mission is to explain the benefits of Amtrak to people that I encounter because I know in my heart that Amtrak is the best way to travel and will bring them to the best destination. As an Amtrak representative I am charged to live by Amtrak's guidance for my life, and to encourage anyone I can to live by them as well. Sure, there is Greyhound, and United Airlines out there, who may not promote their mode of travel in the same way, but just because other modes of travel don't require their representatives to share and encourage others to join them doesn't make what Amtrak does wrong. I don't mind people learning about Greyhound or United Airlines, but my hope is that they see the benefits of traveling via Amtrak outweigh those of the “competitors.”
The thing that makes this all difficult is that everyone's “mode of travel” can be something different, but we all feel strongly about the company we chose to travel with, and some chose not to travel at all, and that is where toes begin to be stepped on.