Rowan Williams is a wonderful writer and a very thoughtful Christian. I highly recommend this essay of his, Silence in the Face of Mystery.
Mystery, a brief reflection
What is mystery? Often people think of mystery as a problem to be solved. When we read a mystery book or watch a mystery on TV, if we are smart, observant, and persistent we can solve the mystery. Christians talk about mystery as something which is ultimately unknowable. God is, of course, the ultimate mystery. […]