The expression 'giving the person away' (line 8) most nearly means

Gerard Manley Hopkins is known for his innovative use of language and meter, particularly in his religious poetry. While he made lasting contributions to Victorian literature, he did not author the poem in question, which is attributed to Milton.

Robert Herrick was a 17th-century poet famous for his lyrical poems, particularly those celebrating the pleasures of life and nature. Although Herrick's work is significant, he is not the author of the poem referenced, as it aligns more closely with Milton's thematic and stylistic elements.

Percy Bysshe Shelley is recognized for his romantic poetry that often emphasizes individualism and nature. While Shelley’s works are influential, he did not write the poem in question, which is distinctly characteristic of Milton's style and subject matter.

John Milton's authoritative voice and rich themes in his poetry, particularly in works like "Paradise Lost," establish him as the definitive author of the poem in question. His exploration of profound philosophical and theological themes aligns perfectly with the content of this poem.