Wordsworth outlines his theory of poetry in the preface to Lyrical Ballads. He argues that poetry should use ordinary language to describe ordinary things and experiences from common life in order to present them in an unusual way. A good poem originates from spontaneous powerful emotions that are recollected with tranquility. Wordsworth also emphasizes that poetry should not use personifications or elevated style, but rather the simple language of men to transmit feelings. The subject of poetry, according to Wordsworth, should be common life, ordinary things, and regular feelings from nature.