How does Chinua Achebe use imagery in A Man of the People?

Examples of Imagery:

They were not only ignorant but cynical. Tell them that this man has used his position to enrich himself and they would ask you –as my father did—if you thought that a sensible man would spit out the juicy morsel that good fortune placed in his mouth.

After seven years of lethargy any action seemed welcome and desirable; the country was ripe and impatient to shed in violent exercise the lazy folds of flabby skin and fat it had put on in the greedy years of indolence.