In his brief yet insightful volume What Does the Old Testament Say About God, Claus Westermann writes the following:
“What does the Old Testament say about God? The answer to this question has to be given from the Old Testament in its entirety. It is the task of a theology of the Old Testament to describe and view together what the Old Testament as a whole, in all its sections, says about God. The task is not correctly understood if one takes one part of the Old Testament to be the most important and gives it prominence over the others; or if one regards the whole as determined by one concept such as covenant or election or salvation; or if one asks, to begin with, what the theological center of the Old Testament is. The New Testament obviously has its center in the suffering, death, and resurrection of Christ, to which the Gospels are directed and which the Epistles take as their starting point. The Old Testament, however, has no similarity at all to this structure. It is therefore not possible to translate the problem of the theological center from the New to the Old Testament” (11)
Spot on, Westermann. Spot on.