From the New York Times:
"... [Bill Rose after handing him the interview] made [Bruner] repeat this response to a question on the role of mental attitude in racing: “I’d say that swimming is at least 90 percent mental. You can work harder than anyone but lose a race because you don’t have a positive attitude. The swimmer with the best attitude is the one that will win the race.”
Bruner, in effect, delivered his own pep talk. In the 200 butterfly preliminaries, he and Bill Forrester became the first Americans, and the first swimmers after East Germany’s Roger Pyttel, to break the two-minute barrier. Forrester was timed in 1 minute 59.70 seconds, three-hundredths of a second better than Bruner, who came back that night to outtouch him in the final, 2:00.03 to 2:00.08, to secure his first individual berth to the Montreal Games. ..."