“They say that patriotism is the last refuge to which a scoundrel clings.”

April 7, 1775, p. 253
Boswell's full mention of this statement reads:
:Patriotism having become one of our topicks, Johnson suddenly uttered, in a strong determined tone, an apophthegm, at which many will start: "Patriotism is the last refuge of a scoundrel." But let it be considered, that he did not mean a real and generous love of our country, but that pretended patriotism which so many, in all ages and countries, have made a cloak of self-interest.
Life of Samuel Johnson (1791), Vol II

" O, Synecdoche, my Synecdoche! http://blogs.suntimes.com/ebert/2008/11/o_synecdoche_my_synecdoche.html," (10 November 2008)
Context: I was instructed long ago by a wise editor, "If you understand something you can explain it so that almost anyone can understand it. If you don't, you won't be able to understand your own explanation." That is why 90% of academic film theory is bullshit. Jargon is the last refuge of the scoundrel.

On polls showing that many Americans would support a restriction of free speech especially if against speech held to be unpatriotic, in a speech to the Society of Professional Journalists (11 September 2004)

"Family Values," The Worst Years of Our Lives: Irreverent Notes from a Decade of Greed (1991)

"Some More -isms" (p. 32)
Modern Philosophy (1995)

True Citizenship at the Children's Theater 1907

Aliens Cause Global Warming (2003)
Context: I want to pause here and talk about this notion of consensus, and the rise of what has been called consensus science. I regard consensus science as an extremely pernicious development that ought to be stopped cold in its tracks. Historically, the claim of consensus has been the first refuge of scoundrels; it is a way to avoid debate by claiming that the matter is already settled.

Source: The Prague Cemetery

The Canton, Ohio Speech, Anti-War Speech (1918)