Jesse A. Schroeder

I love this guy - his books, and you have to love this video of him explaining what it means "to de-center the idea that we can somehow have the answers without it transforming us radically." If you watch this short clip, and get what he's talking about, you will feel enough conviction about your life for the rest of the weekend.
 

For a challenging and mind-bending read, check out "The Fidelity of Betrayal: Towards a Church Beyond Belief" (you can borrow my copy if you want, as long as you promise to read it, and then buy me a cup of coffee while we have a conversation about it :)