As soon as the poet ceases to represent in words what exists in
nature, he in fact ceases to resemble the painter; for if the poet,
leaving such representation, proceeds to describe the flowery and
flattering speech of the figure, which he wishes to make the
speaker, he then is an orator and no longer a poet nor a painter.
And if he speaks of the heavens he becomes an astrologer, and
philosopher; and a theologian, if he discourses of nature or God.
But, if he restricts himself to the description of objects, he would
enter the lists against the painter, if with words he could satisfy
the eye as the painter does.