We write for the same reason that we walk, talk, climb mountains or swim the oceans - because we can. We have some impulse within us that makes us want to explain ourselves to other human beings.
Maya AngelouThe subject of the poem usually dictates the rhythm or the rhyme and its form. Sometimes, when you finish the poem and you think the poem is finished, the poem says, "You're not finished with me yet," and you have to go back and revise, and you may have another poem altogether. It has its own life to live.
Maya Angelou