The titles occur in English versions after the heading (e.g., "Psalm 1") and before the first verse. there is considerable circumstantial evidence that the psalm titles were later additions." However, one should not understand this statement to mean that they are not inspired.They were usually the first verse in the Hebrew Bible. As with some of the added and updated material in the historical books, the Holy Spirit evidently led editors to add material that the original writer did not include. There is some difference in the numbering of the psalms among versions.More recent scholars of the form critical school include Mowinckel, Eissfeldt, Bentzen, Engnell, Oesterley, Robinson, Leslie, Westermann, and Gerstenberger.Sigmund Mowinckel followed Gunkel but took a more radical approach and proposed that virtually all of the psalms were composed for liturgical or cultic purposes.Psalm , for example, seems to mark the end of a collection of David's psalms that antedated the Psalter we now have, but which editors incorporated into the larger work. ) all organized temple singing, and may have had a hand in compiling some of the psalms. Saints of all ages have appropriated this collection of prayers and praises in their public worship and private meditations." The psalms are all prayers written in Hebrew poetry. Thus parallelism alone is not a sufficient criterion to define poetry. The most frequent types of parallelism are the following: In synonymous parallelism, the writer repeats the thought of the first line in the following line (e.g., 1:2; 24:1-3; 25:4).
He further subdivided the psalms of lament into either communal or individual, depending on the speaker, and he subdivided the psalms of praise into declarative (communal or individual) or descriptive, depending on the subject matter.
"The best solution is to regard the titles as early reliable tradition concerning the authorship and setting of the psalms. We can date some of the psalms that do not contain information about their writers in the title, if they have a title, by their subject matter. It seems likely that Ezra, the great renovator of postexilic Judaism, may have been responsible for adding these and perhaps putting the whole collection in its final form. There is some chronological progression, with David most in evidence in the first half, and a clear allusion to the captivity towards the close of Book V (Ps. But David reappears in the next psalm (138), and by contrast, the fall of Jerusalem had been lamented as far back as Psalm 74." Each of the five books or major sections of the Psalter ends with a doxology, and Psalm 150 is a grand doxology for the whole collection.