Quotes from book
            The Wonderful Wizard of Oz
            
        
        
        
            
                    The Wonderful Wizard of Oz is an American children's novel written by author L. Frank Baum and illustrated by W.W. Denslow, originally published by the George M. Hill Company in Chicago on May 17, 1900. It has since seen several reprints, most often under the title The Wizard of Oz, which is the title of the popular 1902 Broadway musical adaptation as well as the iconic 1939 live-action film.
                                        
                                        this is a line spoken by Frank Morgan's depiction of the Wizard of Oz in the 1939 film, which debuted 20 years after Baum's death. It did not actually appear in the "Wonderful Wizard of Oz". The ending of "Steam Engines of Oz" wrongly attributes this phrase to Baum when it would've originated from the 1939 adaptation script writers Langley/Ryerson/Woolf. 
Misattributed 
Variant: A heart is not judged by how much you love; but by how much you are loved by others 
Source: The Wonderful Wizard of Oz
                                    
“Oh, no, my dear; I'm really a very good man, but I'm a very bad Wizard, I must admit.”
Source: The Wonderful Wizard of Oz (1900)
                                        
                                        The Wonderful Wizard of Oz (1900) 
Context: There were only four witches in all the Land of Oz, and two of them, those who live in the North and the South, are good witches. I know this is true, for I am one of them myself, and cannot be mistaken. Those who dwelt in the East and the West were, indeed, wicked witches; but now that you have killed one of them, there is but one Wicked Witch in all the Land of Oz — the one who lives in the West.