Ornaments

Tagore's "Song VII" is full of accessories, ornaments, and jingling things. In fact, Tagore represents his poem as a woman all dressed up in fine, fancy jewelry. We can think of her as a fashionista with loads of Louis Vuitton and Burberry gear. These "ornaments" that the speaker focuses on are a metaphor for literary language that's complicated, that's all fancy-shmancy.

• Line 1: Here the speaker tells us that his personified song is stripping down. She's "put[ting] off" her adornments. This suggests the idea that adornments (including literary adornments) aren't all they're cracked up to be. 
• Line 2: With continued personification, this line depicts the poem as humble. She has "no pride of dress or decoration." By saying this, the speaker associates dress and decoration—and by extension complicated poetic language—with pride. It's not good to be too proud, or too decorated. 
• Line 3: In saying that ornaments would "mar our union," the speaker suggests that fancy poetic language would get in between him and the divine. The best way to know the divine, the speaker suggests, is through simple, pure poetic language, not "ornamented" poetic language. 
• Line 4: The speaker says that the metaphorical "jingling" of his poetic ornaments would "drown" out the whispers of the divine. This indicates that the best way to communicate with God is through poetry that is simple and straightforward.