A revelation is presupposed by the notion of faithfulness. It is not possible in heathenism. Dumb idols,' which have given their worshippers no promises, cannot be thought of as faithful. By its grand conception of Jehovah as entering into a covenant with Israel, the Old Testament presents Him to our trust as having bound Himself to a known line of action. Thereby He becomes, if we may so phrase it, a constitutional monarch.