Reinhold Niebuhr, approaching the ethical field as a theologian rather than as a philosopher, has maintained that the Christian ethic is not single and indivisible, but that, on the contrary, it consists of what one might call an absolute ethic and a kind of interim ethic in which the notion of justice is prominent. Without commenting on Niebuhr's work I wish to put forward a view which, although more general than his, is perhaps not without a superficial resemblance to it.