Christian parables have retained their force well beyond the sphere of religion; indeed, they share with much of modern literature their status as a form of address: "Who hath ears to hear, let him hear." There is no message without there first being--or, more subtly, without there also being in the message itself--an address to a capacity or an aptitude for listening. This is not an exhortation of the kind "Pay attention " Rather, it is a warning:...