Though Pope’s philosophical ambitions result in a rather incoherent epistle, the poem demonstrates a masterful use of the heroic couplet. Some of the most quoted lines from Pope’s works actually appear in this poem. For example, the quotation “Hope springs eternal in the human breast: / Man never is, but always to be blest” appears in the problematic first epistle (95-6). Pope’s skill with verse thus far outweighs his philosophical aspirations, and it is fortunate that he chose to write in verse rather than prose. Indeed, eighteenth-century critics saw An Essay on Man as a primarily poetic work despite its philosophical themes.