In order for the character of a human being to reveal truly exceptional qualities, we must have the good fortune to observe its action over a long period of years. If this action is devoid of all selfishness, if the idea that directs it is one of unqualified generosity, if it is absolutely certain that it has not sought recompense anywhere, and if moreover it has left visible marks on the world, then we are unquestionably dealing with an unforgettable character.
Jean Giono - The Man Who Planted Trees