Writing a poem.
There are lots of things that contribute to the outcome, the poem.
-Certain words hold a hard to describe sensation to them, they're made to evoke some feelings and also give a sense of unique kind of rhythm. Had the writer used a synonym, it wouldn't have the same impact on the reader. He's like mysterious chemist adding proper ingredients to his mixture to make it work perfectly.
-The way a writer constructs the poem leads to rhythm as well, how he decides to start a new verse that divides a sentence, the way he locates words - or even blank spaces - on the surface of sheet - the field of his performance - it all contributes to the creation of imagery. Therefore, we can see that creating a poem isn't just writing words. It's how you put them together, too. A poem that's being created, sometimes slightly wanders away from the realm of plain writing - and goes beyond.