"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."
— Albert Einstein

"He who stands for nothing will fall for anything."
— Alexander Hamilton

"People demand freedom of speech as a compensation for the freedom of thought which they seldom use."
— Søren Kierkegaard

"There is no sin except stupidity."
— Oscar Wilde

"If complete and utter chaos was lightning, then he'd be the sort to stand on a hilltop in a thunderstorm wearing wet copper armour and shouting 'All gods are bastards!'"
— Terry Pratchett (The Color of Magic)

"In politics, stupidity is not a handicap."
— Napoleon Bonaparte

"You are not entitled to your opinion. You are entitled to your informed opinion. No one is entitled to be ignorant."
— Harlan Ellison

"The two most common elements in the universe are Hydrogen and stupidity."
— Harlan Ellison

"There is more stupidity than hydrogen in the universe, and it has a longer shelf life."
— Frank Zappa

"It's too bad stupidity isn't painful."
— Anton Szandor LaVey

"If it is stupid but it works, it isn't stupid.
(a Shin'a'in saying)"
— Mercedes Lackey (Owlknight)

"Honestly, if you were any slower you'd be going backwards."
— J.K. Rowling

"He had just about enough intelligence to open his mouth when he wanted to eat, but certainly no more."
— P.G. Wodehouse

"[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on Earth."
— Stephen W. Hawking

"Beauty fades, dumb is forever."
— Judge Judy Sheindlin (Beauty Fades, Dumb is Forever)

"To be stupid, and selfish, and to have good health are the three requirements for happiness - though if stupidity is lacking, the others are useless."
— Julian Barnes (Flaubert's Parrot)

"Genius may have its limitations, but stupidity is not thus handicapped."
— Elbert Hubbard

"Stupidity is the same as evil if you judge by the results."
— Margaret Atwood (Surfacing)

"Anger is stupid, and stupidity will kill you more surely than your opponent's blade."
— Patricia Briggs (Dragon Bones)

"All the other children at my school are stupid. Except I'm not meant to call them stupid, even though this is what they are."
— Mark Haddon (The Curious Incident of the Dog in the Night-Time)

""Never ascribe to malice that which can adequately be explained by incompetence.""
— Napoleon Bonaparte

"The probability of some one watching you is directly proportional to the stupidity of your actions.

"
— dunno*

"Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say there is more stupidity than hydrogen, and that is the basic building block of the universe."
— Frank Zappa

"I have defined the hundred per cent American as ninety-nine per cent an idiot."
— George Bernard Shaw

"Humans beings always do the most intelligent thing…after they’ve tried every stupid alternative and none of them have worked"
— Buckminster Fuller

"Talk, talk, talk: the utter and heartbreaking stupidity of words."
— William Faulkner (Mosquitoes: A Novel)

"I mean to say, I know perfectly well that I've got, roughly speaking, half the amount of brain a normal bloke ought to possess. And when a girl comes along who has about twice the regular allowance, she too often makes a bee line for me with the love light in her eyes. I don't know how to account for it, but it is so."

"It may be Nature's provision for maintaining the balance of the species, sir."
— P.G. Wodehouse

"There's a thin line between genius and bottom-barrel stupidness. I hover delicately on a tightrope between the two, wondering where I'll land if I'll ever fall."
— Suzanne Crowley (The Very Ordered Existence of Merilee Marvelous)

""The only victories which leave no regret are those which are gained over ignorance.""
— Napoleon Bonaparte

"I have a problem. It's called stupidity. And it's incurable... Crap!"
— Mayrose Porter

"Admiration is the daughter of ignorance."
— Thomas Fuller

"The man whose whole life is spent in performing a few simple operations, of which the effects are perhaps always the same, or very nearly the same, has no occasion to exert his understanding or to exercise his invention in finding out expedients for removing difficulties which never occur. He naturally loses, therefore, the habit of such exertion, and generally becomes as stupid and ignorant as it is possible for a human creature to become. "
— Adam Smith (The Wealth of Nations)

"Genius may have its limitations, but stupidity is not thus handicapped.
"
— Elbert Hubbard

"Pollution isn't what's harming the environment. It's the impurities in our air and water that are doing it."
— Al Gore

"Stupidity lies in wanting to draw conclusions."
— Gustave Flaubert

"I admit that I myself am far from having a complete command of every topic I touch on, but my knowledge of my subject is always greater than the interest or the understanding of my auditors. You see, there is one very good thing about mankind; the mediocre masses make very few demands of the mediocrities of a higher order, submitting stupidly and cheerfully to their guidance"
— Alfred de Vigny (Stello)

"[Chess] is a foolish expedient for making idle people believe they are doing something very clever, when they are only wasting their time. "
— George Bernard Shaw (The Irrational Knot)

"Stupidity is like bumping into a wall all the time. After a while you get tired of it and try to look the situation over and see if there’s a doorway somewhere. I think most people eventually do look for the doorway and stop bumping into the wall"
— Robert Anton Wilson