If you take a look at a circle missing a little bit of the whole perimeter line, your brain will do the rest and you will perceive the shape as a full circle. Whether there is no circle in a way that is called closure in Gestalt and might not be related to the usual closure talked about in Literature circles. This idea of closure brings up symbolic relationships used by the images of the poem that most of us know as metaphor and metonymies. This last one as in the one where the reader does the closure job and is very similar to “the part for the whole”