The cause of death was not disclosed.
In
 2009, Dyer was diagnosed with chronic lymphocytic leukemia but he 
claimed to have treated the disease with positive thinking, daily 
workouts and "psychic surgery" by the Brazilian spiritualist João 
Teixeira de Faria.
Dyer, a 
psychotherapist and former professor at St. John's University in New 
York, was a friend and frequent guest of Oprah Winfrey, appearing on her
 show many times over the years.
The former daily talk-show host and head of the OWN network tweeted a tribute to Dyer on Sunday night:
It was always a pleasure to talk
 to @DrWayneWDyer about life's big questions. He always had big answers.
 RIP Wayne. You brought the Light. - Oprah Winfrey (@Oprah) August 31, 2015
Ellen DeGeneres, another longtime fan of Dyer's, offered her own tribute, complete with a photo from her 2008 wedding to actress Portia De Rossi.
Ellen DeGeneres, another longtime fan of Dyer's, offered her own tribute, complete with a photo from her 2008 wedding to actress Portia De Rossi.
The world has lost an 
incredible man. Wayne Dyer officiated our wedding & was an 
inspiration to so many. Sending love pic.twitter.com/kzsCS278jr -- Ellen
 DeGeneres (@TheEllenShow) August 30, 2015
In
 more than 30 books, including "The Power of Intention" and "Stop the 
Excuses! How to Change Lifelong Thoughts," Dyer espoused a philosophy 
that positive, happy thoughts can lead to a positive, happy life.
***
***
the story of Wayne Walter Dyer was classic Dickensian. 
Born
 in Detroit in 1940, Dyer grew up an orphan, an experience that molded a
 self-reliance as well as an aversion to self-pity.   
"I
 grew up in the east side of Detroit in an area where there was very 
little, except for a lot of scarcity, poverty and hunger," he said in a 
2009 interview with Success magazine. "But I never woke up saying, 'I'm 
an orphan again today, isn't this terrible? Poor me,' (...) there were a
 couple of very affluent neighborhoods nearby, but I never thought for 
one second that those people had more than I had. It just seemed that 
they got what they were entitled to, and if I really wanted those 
things, then I would have them, too."
After a stint in the Navy, Dyer pursued an
 education in counseling, graduating with advanced degrees from Wayne 
State University. He was teaching at St. Johns University in New York in
 1976 when he penned his first self-help book. His life would never be 
the same. 
"Your Erroneous Zones: 
Step-by-Step Advice for Escaping the Trap of Negative Thinking and 
Taking Control of Your Life" brought him out of the classroom and the 
clinic and propelled him onto the speaker's circuit, earning him 
millions on its way to becoming one of the best-selling books of all 
time. 
Dyer espoused his philosophy 
throughout the more than 30 self-help books, including "The Power of 
Intention" and "Stop the Excuses! How to Change Lifelong Thoughts." His 
books generally centered around the notion that one has to has to think 
positive, happy beliefs in order to live a positive, happy life. 
He
 stayed busy until the very end, doling out pithy nuggets of wisdom to 
his Twitter followers ('chasing success is like trying to squeeze a 
handful of water. The tighter you squeeze, the less water you get.') and
 maintaining a hectic speaking schedule. 
Dyer, who lived in Maui, married three times and had eight children. 
