The popular appeal of this simple poem is likely the source of its endurance despite the continuing negative opinion of the poem's merits from scholars and critics. According to Robert Holliday, Kilmer's friend and editor, "Trees" speaks "with authentic song to the simplest of hearts" and that "(t)he exquisite title poem now so universally known, made his reputation more than all the rest he had written put together. That impeccable lyric which made for immediate widespread popularity." Its popularity has also led to parodies of the poem—some by noted poets and writers. The pattern of its first lines ("I think that I shall never see / A poem lovely as a tree.") is of seemingly simple rhyme and meter and easy to mimic along with the poem's choice of metaphors. One of the best known parodies is "Song of the Open Road" by American humorist and poet Ogden Nash (1902–1971):