How does Gordon Korman use imagery in Son of the Mob?

Imagery:

"But once you let the corruption in, you're shutting the door on your old self."

“Think what a terrible burden it is for a high school kid: if you say the wrong thing in the privacy of your own home, you might end up sending your father to prison.”

“The incident is never mentioned at our house, but from that day on I understand that Mom has a titanium backbone to go with her heart of gold.”