The key to the character of the Wizard is that he is a humbug in a world where all other creatures have their unique magic. A carnival veteran, he must organize his world using his talents of illusion and character to survive. The Wizard is the Professor, the Doorman, The Cabby and The Guard. To protect his illusion, he must adapt his character so that all approaches to the truth about him can be foreseen and directed. His magical skills are his illusions and his acting. Skilled in timing, pattern and the technical arts, he is able to portray convincingly, the Great and Powerful Oz.
Yet the face of the Professor when at last found out is the face of a man worn with the worries of his promises to fulfill dreams when all of his illusions only served to open the paths of those whom the Guard favored to enter his presence.Oz is mighty. The professor is careworn. The Guard is sympathetic. The Cabby is carefree. The Doorman is bothered.
Not a man of great personal courage, he was nonetheless a man of great wit and penetrating insight. The quests he sent his visitors on redressed the evils of great magic used to enslave the playful productive citizens of Oz. Though the Witches were all powerful, they had no power over each other. This kept the light and dark powers of Oz in balance. Yet balance is not peace. The evil witches were free to enslave, and the good witches could only rule justly in their own realms. Changing the balance of power between the Good Witches of the North and South, the East and West, by that part of himself that was great and good, by example that was one part fraud, and one part believer in his own tales, this good man brought peace to the land of Oz, such were the tales of Oz.