„I will avoid despair but if this disease of the mind infects me then I will work on in despair. I will toil and I will endure. I will ignore the obstacles at my feet and keep my eyes on the goals above my head, for I know that where dry desert ends, green grass grows.“
— Og Mandino, buch The Greatest Salesman in the World
Quelle: The Greatest Salesman in the World (1968), Ch. 10 : The Scroll Marked III, p. 66.