“Love is the delusion that one woman differs from another.”
                                        
                                        Sententiæ 
1940s–present, A Mencken Chrestomathy (1949)
                                    
“Love is the delusion that one woman differs from another.”
                                        
                                        Sententiæ 
1940s–present, A Mencken Chrestomathy (1949)
                                    
“My business is not prognosis, but diagnosis. I am not engaged in therapeutics, but in pathology.”
1920s, Notes on Democracy (1926)
                                        
                                        "Coda" from Smart Set (December 1920) 
1920s
                                    
“Poverty is a soft pedal upon the branches of human activity, not excepting the spiritual.”
Источник: 1910s, A Book of Prefaces (1917), Ch. 4
“I don't have prejudice, I hate everyone equally.”
                                        
                                        Attributed in The Mammoth Book of Jokes (2006) edited by Geoff Tibbals; no earlier citation yet located. 
Disputed
                                    
                                        
                                        On Politics: A Carnival of Buncombe (1920-1936), p. 279 
1920s
                                    
                                        
                                        A Little Book in C Major, New York, NY, John Lane Company (1916) p. 76 
1910s
                                    
                                        
                                         "The American: His New Puritanism," http://books.google.com/books?id=tn9HAAAAYAAJ&q=%22If+there+is+one+mental+vice+indeed+which+sets+off+the+American+people+from+all+other+folks+who+walk+the+earth%22+%22it+is+that+of%22+%22that+every+human+act+must+be+either+right+or+wrong+and+that+ninety-nine+percent+of+them+are+wrong%22&pg=RA1-PA87#v=onepage The Smart Set (February 1914) 
1910s
                                    
                                        
                                        The American Mercury (May 1933), p. 136 
1930s
                                    
1920s, Notes on Democracy (1926)
“Injustice is relatively easy to bear; what stings is justice.”
Источник: 1920s, Prejudices, Third Series (1922), Ch. 3
1940s–present, A Mencken Chrestomathy (1949)
“Jealousy is the theory that some other fellow has just as little taste.”
1940s–present, A Mencken Chrestomathy (1949)
“The lunatic fringe wags the underdog.”
                                        
                                        Sententiæ: The Citizen and the State 
1940s–present, A Mencken Chrestomathy (1949)
                                    
“A man may be a fool and not know it — but not if he is married.”
1940s–present, A Mencken Chrestomathy (1949)
                                        
                                        The Philosophy of Friedrich Nietzsche (1908), pg. 217 
1900s
                                    
                                        
                                        35 
1940s–present, Minority Report : H.L. Mencken's Notebooks (1956)