" Despite incessant disappointment, he doggedly pursued a position. Each morning, he left his boardinghouse at eight o’clock, clothed in a dark suit with a high collar and black tie, to make his rounds of appointed firms. This grimly determined trek went on each day—six days a week for six consecutive weeks—until late in the afternoon. The streets were so hot and hard that he grew footsore from pacing them. His perseverance surely owed something to his desire to end his reliance upon his fickle father. At one point, Bill suggested that if John didn’t find work he might have to return to the country; the thought of such dependence upon his father made “a cold chill” run down his spine, Rockefeller later said.27 Because he approached his job hunt devoid of any doubt or self-pity, he could stare down all discouragement. “I was working every day at my business—the business of looking for work. I put in my full time at this every day.”28 He was a confirmed exponent of positive thinking. "

― Ron Chernow , Titan: The Life of John D. Rockefeller, Sr.