what is the of exact original/source text of "Life is really simple, but we insist on making it complicated" I was browsing http://www.brainyquote.com/ website and found that the top one quote on hot topic "life" is an quote from Confucius(http://www.brainyquote.com/quotes/topics/topic_life.html):

"Life is really simple, but we insist on making it complicated"

I do read part of The Analects of Confucius however I doesn't remember any quote with similar meaning. what is the exact original/source text of quote above? How should I translate it to Chinese? I have tried google translation but only get Vernacular Chinese sentence which of course could not be the original one.
On the wikipedia page for Confucius, in the "Misattributed" section, you can find this quote:


  Life is really simple, but we insist on making it complicated.
  
  Attributed on the internet but not found in print prior to an attribution in Aero Digest, 1949, p. 115