Freedom is fullness, especially fullness of life; and a full vessel is more rounded and complete than an empty one, and not less so. To vary Browning's phrase, we find in prose the broken arcs, in poetry the perfect round. Prose is not the freedom of poetry; rather prose is the fragments of poetry. Prose, at least in the prosaic sense, is poetry interrupted, held up and cut off from its course; the chariot of Phoebus stopped by a block in the Strand. But when it begins to move again at all, I think we shall find certain old-fashioned things move with it, such as repetition and even measure, rhythm and even rhyme.
G. K. Chesterton, "The Slavery of Free Verse", Fancies Versus Fads.