God is known by what He has done.' This sentence sums up one of the leading themes of biblical theology. The biblical writers (it is said) thought of revelation, not in terms of propositions or ideas, but as taking place through historical events in which God disclosed His nature and purpose. Moreover, these events were not the inner spiritual experiences of mystics, but public events involving the destinies of nations as well as individuals. The events had to be interpreted, of course, and the revelation was not complete without the interpretation; but the knowledge of God was always an inference from what had happened, never a matter of general or timeless concepts.