How does Andrew Ross Sorkin use imagery in Too Big to Fail: The Inside Story of How Wall Street and Washington Fought to Save the FinancialSystem--and Themselves?

Imagery:

"You always needed a lot of cash on hand to ride out the storm, he would say."

"On Wall Street, there are two kinds of bankers: the silky smooth salesmen who succeed based on wits and charm, and those who persist with bulldog tenacity. Paulson was of the latter type, as the white House soon discovered."