
“All you need in this life is ignorance and confidence, and then Success is sure.”
Mark Twain's Notebook, 1887
Letter to Cordelia Welsh Foote (Cincinnati), 2 December 1887. Letter reprinted http://www.twainquotes.com/Success.html in Benjamin De Casseres's When Huck Finn Went Highbrow https://www.worldcat.org/title/when-huck-finn-went-highbrow/oclc/2514292 (1934)