Coleridge 

The difference between prose and poetry is as below:
'' Poem is a work which is made up of highly rhythmic and lyrical words." It is used to express the imagination of a poet in an extraordinary form. When the one write poem, his or her feeling is not like a common person. They think different, they can see different and express their observation and views differently. That makes poem. 
, Simple sentence: The sun and moon looks like they are revolving around the earth.

Poem : The sun and moon revolving around the Earth;
              As if they suggest the circle of death and Birth. (Self made)

Ans --2

Between Poe and Poetry,
Poem from poetry Coleridge points out that “poetry of the highest kind may exist without metre and even without the contradistinction objects of a poem”. He gives example of the writings of Plato, Jeremy Taylor and Bible. The quality of the prose in this writings is equal to that of high poetry. He also asserts that the Poem of any length neither can be, nor ought to be, all poetry.
It is a Distinction resulting from the poetic genius itself, which sustains and modifies the images, thoughts, and emotions of the poet’s own mind. This is so because ‘Poetry” for Coleridge is an activity of the poet’s mind and a poem is merely one of the forms of its expression, a verbal expression of that activity, and poetic activity is basically an activity of the imagination.