Man is the only slave. And he is the only animal who enslaves. He has always been a slave in one form or another, and has always held other slaves in bondage under him in one way or another. In our day, he is always some man's slave for wages, and does that man's work; and this slave has other slaves under him for minor wages, and they do his work. The higher animals are the only ones who exclusively do their own work and provide their own living.
Humor, to be comprehensible to anybody, must be built upon a foundation with which he is familiar. If he can't see the foundation the superstructure is to him merely a freak -- like the Flatiron building without any visible means of support -- something that ought to be arrested.
It is impossible that a genius - at least a literary genius - can ever be discovered by his intimates; they are so close to him that he is out of focus to them and they can't get at his proportions; they can't perceive that there is any considerable difference between his bulk and their own.
The Germans are exceedingly fond of Rhine wines; they are put up in tall, slender bottles, and are considered a pleasant beverage. One tells them from vinegar by the label.
It has always been a peculiarity of the human race that it keeps two sets of morals in stock-the private and the real, and the public and the artificial.