The test of a real comedian ...

The test of a real comedian is whether you laugh at him before he opens his mouth.
 George Jean Nathan

Quotes from the same author

Love demands infinitely less than friendship.
 George Jean Nathan
I know many married men, I even know a few happily married men, but I don't know one who wouldn't fall down the first open coal hole running after the first pretty girl who gave him a wink.
 George Jean Nathan
It is the mark of a superior person that, left to themselves they are able endlessly to amuse, interest and entertain themselves out of their personal stock of meditations, ideas, criticisms, memories, philosophy, humor and what not.
 George Jean Nathan
Sex touches the heavens only when it simultaneously touches the gutter and the mud.
 George Jean Nathan
It is only the cynicism that is born of success that is penetrating and valid.
 George Jean Nathan