How does Nick Hornby use imagery in High Fidelity?

Imagery:

“Sentimental music has this great way of taking you back somewhere at the same time that it takes you forward, so you feel nostagic and hopeful all at the same time.”

“It's no wonder we're all such a mess, is it? We're like Tom Hanks in Big. Little boys and girls trapped in adult bodies and forced to get on with it.”