Poems are created out of poetic devices via a composite of: structural, grammatical, rhythmic, metrical, verbal, and visual elements.
Along with syntax, poetic diction functions in the setting the tone, mood, and atmosphere of a poem to convey the poet's intention.
Poetic rhythm is the flow of words within each meter and stanza to produce a rhythmic effect while emphasising specific parts of the poem.
Poetic form[3] is the physical structure of the poem: the length of lines, rhythm, as well as system of rhymes and repetition.
[3] It may also be the case that the poet works by 'ear' or instinct, generating local hybrid forms that evolve in dialogue with the composition process.
A lack of punctuation may allow the poem to be interpreted as a "stream of consciousness" such as Maya Angelou’s I know why the caged bird sings.