"You can't check infinitely-many things... you don't have all day." Carol Brunzell
"In an age of universal deceit, telling the truth is a revolutionary act" attributable, in reverse chronological order, at least to: George Orwell , Antonio Gramschi, and (via Rosa Luxemburg), Ferdinand Lasalle (1862) (Thanks to Brad Brock for the backward pointers!)
"Be as honest as your mouth will allow." Olivia Brunzell-Garrett
"An infallible method of conciliating a tiger is to allow oneself to be devoured." Konrad Adenauer
"There are many truths, Lucinda. Some are uplifting, others are not." Uncle Bob, Plan 10 from Outer Space
"If you tell the truth, you don't have to remember anything." Mark Twain
"The law in its majestic equality forbids the rich as well as the poor from stealing bread, begging and sleeping under bridges." Anatole France
"It's not so easy to (meaningfully) fail to prove the Riemann Hypothesis" Anonymous