" I am a rock" (metaphorically)

My favorite picture from The Absolutely True Diary of a Part-Time Indian, is the one on page 33 . Its my favorite because it reminds me of a song by Simon and Garfunkel called " I am a rock". The song is about a man blocks himself from the rest of the world and puts himself on a metaphorical island. He does this because people make fun of him because he likes to read and write poetry, but no matter what they say about him, he doesn't care so therefore he is metaphorically a rock on an island. Junior is like this because at Reardan he is the only Indian, so metaphorically he is on an island with only his drawings and no matter what people say about him, he doesn't change, just like a rock.