From Rob Harrison at The Spyglass:
As Chesterton wryly observed, "The Christian ideal has not been tried and found wanting, it has been found difficult and left untried."
The bottom line here is that true Christian faith is not just intellectual assent to a series of propositions, nor is it a commitment to pursue what we consider to be good and helpful behaviors (though in some sense, both of those are involved): true Christian faith is a belief in a Person, and a commitment to follow that Person, wherever he might lead us. To borrow from the old story about the Great Blondin, it's not just a matter of agreeing that if we get in the wheelbarrow, he'll be able to push us safely across his tightrope over Niagara Falls—it's a matter of actually getting in the wheelbarrow and hanging on. It's a whole-life commitment, giving everything we have to follow Jesus.