Poetry stands apart from the concrete. Like the poeticisms of the Tao Te Ching, it speaks in paradoxes in order to circle an idea that cannot be expressed outright. In “Theory of Poetry” (New and Collected Poems, p. 418), American poet Archibald Macleish writes, "Know the world by heart / Or never know it! / Let the pedant stand apart— / Nothing he can name will show it: / Also him of intellectual art. / None know it / Till they know the world by heart.”