“Every passion has its destiny” is a popular running saying; a poster shows Billy Mills winning the 10,000 meter run in the 1964 Tokyo Olympics. A 2003 article on Billy Mills shows that the saying came from his father:
 
“My father was eloquent in his wisdom. He also said, ‘Ultimately every dream has its passion and every passion has its destiny.’ I was lucky to have him for 12 years. All these years later, I’m still deeply connected to his spirit. He taught me the most significant lessons of my life.”
 
       
Wikipedia: Billy Mills
William Mervin “Billy” Mills, also known as Makata Taka Hela (born June 30, 1938), is the second Native American (after Jim Thorpe) to win an Olympic gold medal. He accomplished this feat in the 10,000 meter run (6.2 mi) at the 1964 Tokyo Olympics, becoming the only person from the western hemisphere to ever to win the Olympic gold in this event. His 1964 victory is considered one of the greatest of Olympic upsets.  A former United States Marine, Billy Mills is a member of the Oglala Lakota (Sioux) Tribe.
     
Indian Country (Today Media Network)
Olympian Billy Mills: Long may he run
Frank Coffey
8/6/03
(...)
“I was young of course, but my father started teaching me early about the important things. Perhaps he knew he wasn’t going to live long, I don’t know. I remember what he said was most important: ‘You can’t let the anger control you. You have to look deeper than self pity, deeper than jealousy, you have to look way down below those emotions. That’s where dreams live and the pursuit of your dreams will heal you.’ Those might not have been his exact words, but that was the emotional reality. It’s one of the messages I try to convey when I speak. My father was eloquent in his wisdom. He also said, ‘Ultimately every dream has its passion and every passion has its destiny.’ I was lucky to have him for 12 years. All these years later, I’m still deeply connected to his spirit. He taught me the most significant lessons of my life.”
 
Twitter 
Metwell
‏@Metwelldotcom
Every passion has its destiny. -Billy Mills, track http://metwell.com
6:17 AM - 11 Sep 2009
 
Google Books
Long May You Run:
all. things. running.
By Chris Cooper
New York, NY: Touchstone
2010
Pg. 75:
Go into any good running store, and you will see a poster of Billy Mills winning his Olympic race. Underneath is the quote “Every passion has its destiny.” What will yours be?
 
Pratt (KS) Tribune
May 30. 2013 9:04AM
Sports Reflections: It’s how you finish
The Billy Mills story
By Neil DePew
It’s a cliché in sports that it’s not how you start, it’s how you finish. But in the case of Billy Mills, part of the reason he is an Olympic hero has to do with where he started—and the fact that he overcame his unpromising origins to become an icon and a role model long after the shine wore off his Olympic gold medal.
(...)
One thing Mills’ father taught him before his passing was that, to succeed in life, you must discover your passion. “Follow your dreams,” the elder Mills said. “Every dream has a passion. Every passion has its destiny.”
 
Google Books
The Drake Relays:
America’s Athletic Classic
By David Peterson
Iowa City, IA: University of Iowa Press
2014
Pg. 4:
Every passion has its destiny.
—Billy Mills, 1964 Olympic champion, 10,000 meters
 
Twitter
Panama Runners
‏@panamarunners
“Every passion has its destiny”
-Billy Mills pic.twitter.com/b6XhqeSOzl
5:07 PM - 19 Mar 2014