Quotes about stupidity

„Humanitarianism is the expression of stupidity and cowardice.“

—  Adolf Hitler Führer and Reich Chancellor of Germany, Leader of the Nazi Party 1889 - 1945

„There are dignified stupidities, and there are heroic stupidities, and there is such a thing as stupid stupidities, and that would be a stupid stupidity not to have a camera on board.“

—  Werner Herzog German film director, producer, screenwriter, actor and opera director 1942

"The White Diamond" (2004)

„Love is being stupid together.“

—  Paul Valéry French poet, essayist, and philosopher 1871 - 1945

„Hitler decided that. I thought it was stupid because I believed that first we had to defeat England.“

—  Hermann Göring German politician and military leader 1893 - 1946

To Leon Goldensohn, about attacking the Soviets (15 March 1946)
The Nuremberg Interviews (2004)

„It's no shame to be born stupid. Only to die stupid.“

—  Erich Maria Remarque, book Three Comrades

Source: Three Comrades

„Youth ages, immaturity is outgrown, ignorance can be educated, drunkenness sobered, but stupid lasts forever.“

—  Aristophanés Athenian playwright of Old Comedy -448 - -386 BC

Fictional attribution in the movie The Emperor's Club (2002), given by Kevin Kline (as William Hundert); also attributed to Diogenes, without sources; no published occurrences of this statement prior to the movie have been located in any of the Aristophanes Plays or Fragments.
Misattributed
Source: IMDb, "Memorable quotes for The Emperor's Club" http://www.imdb.com/title/tt0283530/quotes, Internet Movie Database, www.imdb.com
Source: Two pages attributing it to Diogenes: http://www.prohibitionists.org/Background/Party_Platform/quickquotes/QQ-education.htm http://www.ryanbalton.com/funstuff/forb_seniorquotes.htm

„Nothing conveys the feeling of infinity as much as stupidity does.“

—  Ödön von Horváth Austro-Hungarian writer 1901 - 1938

Motto of Geschichten aus dem Wienerwald (Tales from the Vienna Wood) (1931).

„God is not stupid. Don't make excuses before Him. God will not make excuses, even though man may cause damage to His promise. You must take that degree of responsibility too.“

—  Sun Myung Moon Korean religious leader 1920 - 2012

The Way of God's Will Chapter 1-5. Tradition, Official Business, and Responsibility http://www.unification.org/ucbooks/WofGW/wogw1-05.htm Translated 1980.

„Stupidity cannot be cured. Stupidity is the only universal capital crime; the sentence is death. There is no appeal, and execution is carried out automatically and without pity.“

—  Robert A. Heinlein American science fiction author 1907 - 1988

„That’s the best thing about being dead. It’s like being stupid. It’s only painful for others.“

—  Ricky Gervais English comedian, actor, director, producer, musician, writer, and former radio presenter 1961

„Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.“

—  Martin Luther King, Jr. American clergyman, activist, and leader in the American Civil Rights Movement 1929 - 1968

Source: 1960s, Strength to Love (1963), Ch. 4 : Love in action, Sct. 3

„Life is tough, but it's tougher if you're stupid. “

—  John Wayne American film actor 1907 - 1979

„I can't live where I want to, I can't go where I want to go, I can't do what I want to, I can't even say what I want to. I decided I was a very stupid fool not to at least paint as I wanted to.“

—  Georgia O'Keeffe American artist 1887 - 1986

„With the lights out, it's less dangerous
Here we are now, entertain us
I feel stupid, and contagious
Here we are now, entertain us.“

—  Kurt Cobain American musician and artist 1967 - 1994

Song lyrics, Nevermind (1991)

„Correct." Kekrops sounded bitter, like he regretted his decision. "My people were the original Athenians--the gemini."
"Like your zodiac sign?" Percy asked. "I'm a Leo."
"No, stupid," Leo said. "I'm a Leo. You're a Percy.“

—  Rick Riordan, book The Blood of Olympus

Variant: Correct." Kekrops sounded bitter, like he regretted his decision. "My people were the original Athenians--the gemini."
"Like your zodiac sign?" Percy asked. "I'm a Leo."
"No, stupid. "I'm a Leo. You're a Percy.
Source: The Blood of Olympus

„The problem is that everybody treats teenagers like they're stupid.“

—  Johnny Depp American actor, film producer, and musician 1963

„For a long while I have lived with the notion that I was the most normal being that ever existed. This notion gave me the taste, even the passion for being unproductive: what was the use of being prized in a world inhabited by madmen, a world mired in mania and stupidity? For whom was one to bother, and to what end? It remains to be seen if I have quite freed myself from this certitude, salvation in the absolute, ruin in the immediate.“

—  Emil M. Cioran, book The Trouble With Being Born

The Trouble With Being Born (1973)

„Our greatest stupidities may be very wise.“

—  Ludwig Wittgenstein Austrian-British philosopher 1889 - 1951

Source: Culture and Value (1980), p. 39e

„Everything happens for a reason. But sometimes the reason is that you're stupid and make bad decisions. “

—  Томми Джо Рэтлифф 1981