Usually the poems are written in one sitting. There's always a groping towards some satisfying ending. But I'd say the hardest part is not writing. Once the writing starts, it's too pleasurable to think of it as a difficulty.
Billy CollinsThe poem is not, as someone put it, deflective of entry. But the real question is, 'What happens to the reader once he or she gets inside the poem?' That's the real question for me, is getting the reader into the poem and then taking the reader somewhere, because I think of poetry as a kind of form of travel writing.
Billy Collins