How does Wladyslaw Szpilman use imagery in The Pianist: The Extraordinary Story of One Man's Survival in Warsaw, 1939-1945?

Imagery:

"Compared to the time that followed, these were years of relative calm, but they changed our lives into an endless nightmare, since we felt with their entire being that something dreadful would happen at any moment-we were just not sure yet when danger threatened, and where it would come from."

"I put my coat on, took off the armband with the blue star for the first time in three years, and slipped out of the gate with them."

"I was alone: alone not just in a single building or even a single part of a city, but alone in a whole city that only two months ago had had a population of a million and a half and was one of the richer cities of Europe."