How does Jonathan Safran Foer use imagery in Extremely Loud and Incredibly Close?

Examples of Imagery:

"I wanted to cry but I didn't cry, I probably should have cried, I should have drowned us there in the room, ended our suffering, they would have found us floating face-down in two thousand white pages, or buried under the salt of my evaporated tears."

"I saw a young girl coming toward me. Her skin was melting down her. It was like wax."