Positive thinking

I came across a New York Times article entitled Positive Thoughts Give Elite Athletes The Vital Edge.
When the difference between winning and losing can be a fraction of a second or the unexpected bounce of a ball, encouraging positive thoughts and banishing the fear of failure is a consistent theme in the lives of successful athletes.
England cricket captain Andrew Strauss is a recent convert to the power of positive thinking, praising the controversial self-help book "The Secret" after his spell in the international wilderness.
"The theory is what you think about happens," said Strauss in his own book "Testing Times." "If you think positive thoughts, then those thoughts will come about."
Read full article:
http://www.nytimes.com/reuters/2009/11/30/sports/sports-us-motivation.html

The video below contains quotes which deal with positive thinking.
"Don't judge yourself each day by the harvest you reap, but the seeds you sow."
Robert Louis Stevenson