The eye of man hath not heard, the ear of man hath not seen, mans hand is not able to taste, his tongue to conceive, nor his heart to report, what my dream was. The poets vision is often above the normal senses of man to grasp what it is through typical sense experience. Bottom unwittingly mixes the sense organs with their senses, but he reflects the insufficiency of the senses to grasp his vision. He cannot express, in the context of prose, what his vision is. The only way to express such a vision is through art.
Art is the imaginative bridge that communicates a vision to an audience.
Bottom is a visionary, but not an artist. He identifies Peter Quince, the only poet he knows, as the organ by which his vision can be conveyed to the world. Through poetry and the theatre, the poet and playwright express what prose and logic cannot. The lunatic, the lover and the poet Are of imagination all compact. Through the medium of theatre, Shakespeare creates what reason cannot understand.