Dating the hebrew bible
The Psalms are meant to be sung -- and accompanied by musical instruments.
David, the author of many of the psalms, was a skilled player of the "harp," more accurately perhaps, the "lyre" ( In western poetry we use both rhyme and rhythm in traditional poems.
Longman recommends caution about any interpretation based primarily on a verse's supposed meter.
However, the element of thought parallelism in Hebrew poetry is quite apparent and has become better understood in recent decades.
The Psalms express the entire spectrum of human emotion -- fear, despair, longing, love, hope, joy, and exultation.
They also instruct us in how we can voice our own prayers and praise to God.
Here the idea of the first line is reinforced in the second line.
You can find parallelism in Jesus' teaching, too (for example, Matthew -45).
Hebrew poetry was a fine art that we are just beginning to appreciate more fully.David, the shepherd boy of the Bethlehem hills, loved to sing, sang to his sheep.Over the years he grew into a gifted songwriter, a poet.But in Hebrew poetry the rhythm may be in terms of units per line.However, the exact nature of this is still debated and some recent scholars have concluded that the Psalms are not metrical, that this is an idea imported from Western poetical forms.