Public Discourse Quotes
After being criticized for printing a ship captain's advertisement that excluded clergymen as passengers, local clergy threatened to boycott the Gazette and take no printing jobs to Franklin. Due to the resulting clamor, Franklin published this "apology," i.e. apologetics, a statement of his philosophy as a printer, and concludes by explaining how and why he printed the offending handbill and why he should not be censured for the act.
Samuel Langhorne Clemens, 1835-1910. Twain was referring to the social norms and customs which make us all edit our speech so that we do not hurt people unnecessarily or mislead someone. True freedom of speech of this kind would exist only if there were no social structure of morality. For almost all of us, the political freedom of speech is what we cherish. The right to say anything and to be edited only by ourselves and our own personal view of propriety is the political. See linked quote for his quotation about the social consequences of exercising freedom of speech.