I don’t know the key to success, but the key to failure, is trying to please everybody. Bill Cosby
I don’t know the key to success, but the key to failure, is trying to please everybody. Bill Cosby

I don’t know the key to success, but the key to failure, is trying to please everybody. Bill Cosby
Great quote from Bill Cosby — except that when I tried to research its origins to see the context, I found out that he apparently didn’t say it.
http://en.wikiquote.org/wiki/Bill_Cosby
“I don’t know the key to success, but the key to failure is trying to please everybody.”
Author unknown; often attributed to Cosby, he actually cites this as a sound advice he once read elsewhere, in “Dr. Bill Cosby” in Ebony, Vol. 32, No. 8 (June 1977), p. 136