How does William Saroyan use imagery in The Human Comedy?

Imagery:

"After a moment [Ulysses] smiled the smile of the Macauley people - the gentle, wise, secret smile which said 'yes' to all things."

"Big Chris, sweating, working hard over the trap, looked from one brother to the other, deeply moved by the calm of the boy in the trap and the furious devotion of his brother."