Well I heard a very sad news about Jure Robic getting killed in a traffic accident.
That news led me to the article that has relevance to this thread. It talks about his mental strength. It's long but it's worth the time, you can read it here: http://www.nytimes.com/2006/02/05/sports/playmagazine/05robicpm.html?_r=2&pagewanted=print
In case you don't know who he was:
"In addition to his 5 RAAM victories, Robic also set the 24-hour road world record, won Le Tour Direct two consecutive times and won the DOS, the race across Slovenia, three consecutive times. Robic achieved over 100 victories and 150 podium appearances throughout his cycling career."