A good Cause doth not want any Bitterness to support it, as a bad one cannot subsist without it. It is indeed observable, that an Author is scurrilous in proportion as he is dull; and seems rather to be in a Passion, because he cannot find out what to say for his own Opinion, than because he has discovered any pernicious Absurdities in that of his Antagonists.

Joseph Addison (1672-1719) English essayist, poet, statesman

Essay (1716-06-29), The Freeholder, No. 55
    (Source)