what's the difference between the church and a para-church?

I'm looking for your input, if you're out there. Here's the question on my mind: 'what's the difference between the church and a para-church?' This is an ongoing question between myself and other fellow youth ministers (in my Philly suburb context), and I'm wondering what you think about it. Before you answer, I want you to think about it. This is not a question to answer off the cuff, from the hip, or from any other part your anatomy until you've prayed about it, and looked over scripture. But I want to know what you think. It is important to think about the answer. Consider the implications. Consider the broader picture of scripture than just one verse (that you're probably proof-texting). Answer it, and then reply to me. I'm interested in what you have to say. The Church is important. It's important that we understand what it is, what it isn't, and why God loves it so. I look forward to your reply.