https://www.poets.org/poetsorg/text/free-verse-poets-glossary
“Free verse is a form of nonmetrical writing that takes pleasure in a various and emergent verbal music. “As regarding rhythm,” Ezra Pound writes in “A Retrospect” (1918): “to compose in the sequence of the musical phrase, not in sequence of a metronome.” Free verse is often inspired by the cadence—the natural rhythm, the inner tune—of spoken language. It possesses visual form and uses the graphic line to differentiate itself from prose. “The words are more poised than in prose,” Louis MacNeice states in Modern Poetry (1938); “they are not only, like the words in typical prose, contributory to the total effect, but are to be attended to, in passing, for their own sake.” The dream of free verse: an originary verbal music for every poem. Jorge Luis Borges explains: “Beyond its rhythm, the typographical appearance of free verse informs the reader that what lies in store for him is not information or reasoning but emotion.””
How my heart sings 