Mark Twain Quotes about Positive Thinking

Mark Twain, Charles Dudley Warner “The Writings of Mark Twain [pseud.]: The American claimant and other stories and sketches”
Thousands of geniuses live and die undiscovered - either by themselves or by others.
Mark Twain (2015). “Autobiography of Mark Twain, Volume 3: The Complete and Authoritative Edition”, p.58, Univ of California Press