Critic Harold Bloom refers to this short poem as "one of Blake's gnomic triumphs." The speaker addresses a rose, which he claims is sick because an “invisible worm” has “found out thy bed/Of crimson joy.” The rose symbolizes earthly, as opposed to spiritual, love, which becomes ill when infected with the materialism of the world. The rose’s bed of “crimson joy” may also be a sexual image, with the admittedly phallic worm representing either lust or jealousy. The worm has a “dark secret love” that destroys the rose’s life, suggesting something sinful or unmentionable.