Tony Snow has a really great article in Christianity Today. Here's a taste:
The moment you enter the Valley of the Shadow of Death, things change. You discover that Christianity is not something doughy, passive, pious, and soft. Faith may be the substance of things hoped for, the evidence of things not seen. But it also draws you into a world shorn of fearful caution. The life of belief teems with thrills, boldness, danger, shocks, reversals, triumphs, and epiphanies. Think of Paul, traipsing though the known world and contemplating trips to what must have seemed the antipodes (Spain), shaking the dust from his sandals, worrying not about the morrow, but only about the moment.The whole thing is really good. Check it out.