As nouns the difference between prose and essay is that prose is language, particularly written language, not intended as poetry while essay is a written composition of moderate length exploring a particular issue or subject. is that prose is to write or repeat in a dull, tedious, or prosy way while essay is (dated|transitive) to try.What is the purpose of prose?
Prose and poetry are two sides of the same coin. Both of them communicate ideas, and both of them can be written beautifully. But the essential purpose of prose is to communicate ideas, and the essential purpose of poetry is to move us with the beauty of its crafted language, and in this distinction the two diverge.