One day Socrates made a young slave the centrepiece of a dialogue. Contrasting the innocent and ignorant boy with the sophisticated citizens, Socrates argued that ‘a man who does not know, has in himself true opinions on a subject without having knowledge’ (Plato Meno 85c). Theologians are in a similar position, and none more so than the practising minister. He has constantly to admit to people that he does not know; but at the same time he claims to have true opinions on human life, the nature of God, and the significance of both.