What is the author's style in The Chambered Nautilus by Oliver Wendell Holmes?

Holmes carefully uses language to develop the meaning, rhythm, and structure of his poem. In addition, his diction, or choice of vocabulary, is carefully selected for various purposes; for example, it sounds somewhat antiquated (even for 1858) in order to make the poem seem more eloquent or authoritative. Finally, the poet uses diction to develop his thematic agenda, using spiritual terminology when he wishes to discuss the human soul and mythological references when he wishes to strike a fanciful or "enchanted" note.