Success Quotes - Page 103
Orison Swett Marden (1907). “The Optimistic Life”
Og Mandino (2011). “The Greatest Salesman in the World, Part II: The End of the Story”, p.125, Bantam
"Essais" by Michel de Montaigne, Book III, Ch. 2, 1595.
"Psycho-Cybernetics Deluxe Edition: The Original Text of the Classic Guide to a New Life".
James Russell Lowell (2016). “Delphi Complete Poetical Works of James Russell Lowell (Illustrated)”, p.523, Delphi Classics