What makes poetry poetic?

I had the swirl and ache
From sprays of honeysuckle
That when they’re gathered shake
Dew on the knuckle.

those familiar verbal tones and inflections take on a charged resonance missing from workaday locutions. What makes the difference is the versification: the casting of phrases into distinct vocal cadences that enable a listener, Pinsky writes, to “detect their presence without a printed version of the poem.” Taken by itself, this may sound suspiciously like a truism — and indeed, there is nothing especially startling about the touchstone concepts that inform Pinsky’s account of poetry’s inner workings. The great virtue of his treatment lies in his demonstration that paying closer attention to how poems like Frost’s work — how the flow of language is measured, how the length of a line builds expectation and tension, how the interplay within patterns of sounds produces audible dynamics that are pleasing and stirring — is a technical concern of the most profound kind, instrumental in appreciating the full import of what Pinsky likes to call the “technology of poetry.””