It is not at all clear that the notion of Divine action makes any sense, or what sort of sense it makes. If it makes no sense, the Christian faith may for a while cling on to a tenuous and marginal existence as a set of legends outlining an optical policy of life. But it will eventually evaporate to take its place with the great legends of Greek and Roman mythology, its policy of life at last becoming as quaint and archaic as that of ancient Athens. It is therefore a matter of vital importance to examine the idea of Divine action, starting again from first principles, to discover what may be said of it in view of the many difficulties raised in the modern age.