divergence of opinion. Older material (often of composite origin) has been used, not so much for the purpose of providing historical information, as with the object of showing the religious significance of past history; and the series Joshua-Kings is actually included among the "prophets" in Jewish reckoning (see MIDRASH). In general, one may often observe that freedom which is characteristic of early and unscientific historians. Thus one may note the reshaping of older material to agree with later thought, the building up of past periods from the records of other periods, and a frequent loss of perspective. The historical traditions are to be supplemented by the great body of prophetic, legal and poetic literature which reveal contemporary conditions in various internal literary, theological or sociological features. The investigation of their true historical background and of the trustworthiness of their external setting (e.g. titles of psalms, dates and headings of prophecies) involves a criticism of the historical traditions themselves, and thus the two major classes of material must be constantly examined both separately and in their bearing on one another. In a word, the study of biblical history, which is dependent in the first instance upon the written sources, demands constant attention to the text (which has had an interesting history) and to the literary features; and it requires a sympathetic acquaintance with Oriental life and thought, both ancient and modern, an appreciation of the necessity of employing the methods of scientific research, and (from the theological side) a reasoned estimate of the dependence of individual religious convictions upon the letter of the Old Testament.[4]