On quick observation, the Quaker lifestyle boasts peace, solitude, and simplicity--qualities that are attractive to any believer of any denomination or religion. Yet living a life of faith is not as simple as it may look. In fact, it's often characterized more by the stumbles than the grace. "When someone asks me what kind of Christian I am," says Quaker author J. Brent Bill, "I say I'm a bad one. I've got the belief part down pretty well, I think...