These are her words from the Preface to SWORD BLADES and POPPY SEED.
No one expects a man to make a chair without first learning how, but there is a popular impression that the poet is born, not made, and that his verses burst from his overflowing heart of themselves. As a matter of fact, the poet must learn his trade in the same manner, and with the same painstaking care, as the cabinet-maker. His heart may overflow with high thoughts and sparkling fancies, but if he cannot convey them to his reader by means of the written word he has no claim to be considered a poet. A workman may be pardoned, therefore, for spending a few moments to explain and describe the technique of his trade. A work of beauty which cannot stand an intimate examination is a poor and jerry-built thing.
In the first place, I wish to state my firm belief that poetry should not try to teach, that it should exist simply because it is a created beauty, even if sometimes the beauty of a gothic grotesque. We do not ask the trees to teach us moral lessons, and only the Salvation Army feels it necessary to pin texts upon them. We know that these texts are ridiculous, but many of us do not yet see that to write an obvious moral all over a work of art, picture, statue, or poem, is not only ridiculous, but timid and vulgar. We distrust a beauty we only half understand, and rush in with our impertinent suggestions. How far we are from "admitting the Universe"! The Universe, which flings down its continents and seas, and leaves them without comment. Art is as much a function of the Universe as an Equinoctial gale, or the Law of Gravitation; and we insist upon considering it merely a little scroll-work, of no great importance unless it be studded with nails from which pretty and uplifting sentiments may be hung!