However, there are two great types of literature which found their characteristic expression in the days of David and Solomon and are always associated with their names--the psalm with David, and the proverb (or, more broadly, "wisdom") with Solomon. Kingdom, temple and palace have long since passed away, but the Psalter and the books of Wisdom are imperishable monuments of the united monarchy.
The Psalter is a collection of one hundred and fifty poems, of various length, meter, and style. As now arranged it is divided into five books, but there is evidence that earlier collections and arrangements preceded the present. Among the earliest productions, judged both by form and by matter, are those psalms which bear the superscription "of David," though it would not be safe to assert that every such psalm came from David's own pen or that none not so labeled is not of Davidic origin. Judged alike from the narrative in the book of Samuel, and from the traditions scattered in other books as early as Amos, ch. 6:5, and as late as Chronicles, I Chron. 15:16 to 16:43; ch. 25, David was both a skilled musician himself and an organizer of music for public worship. It is not surprising, therefore, to find a body of religious poems ascribed to him, which not only evidence his piety and good taste, but also, though individual in tone, are well-adapted to common use at the sanctuary.
The psalms are poems. Their poetry is not simply one of substance, but also a poetry of form. Rime, our familiar device, is of course absent, but there is rhythm, although it is not measured in the same strict way as in most of our poetry. The most striking and characteristic mark of Hebrew poetic form is the parallel structure: two companion lines serve together to complete a single thought, as the second either repeats, supplements, emphasizes, illustrates, or contrasts with the first.
Poetry is also a term to which the book of Proverbs and most of the other productions of "Wisdom" are entitled. While they are chiefly didactic (that is, intended for instruction) instead of lyric (emotional self-expression), nevertheless the Wisdom books are almost entirely written in rhythmic parallelism and contain much matter unsuited to ordinary prose expression. In the Revised Version the manner of printing shows to the English reader at a glance what parts are prose and what are poetry (compare, for example, Job, ch. 2 with Job, ch. 3), though it must be admitted that a hard and fast line cannot be drawn between them. Compare Eccl., ch. 7 with Proverbs.