Stupidity

"There is no vaccine against stupidity."

"He may look like an idiot and talk like an idiot but don't let that fool you. He really is an idiot."

"It is hard to imagine a more stupid or more dangerous way of making decisions than by putting those decisions in the hands of people who pay no price for being wrong."

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

"It is one of the blessings of old friends that you can afford to be stupid with them."

"Only the wisest and stupidest of men never change."

"A noble man compares and estimates himself by an idea which is higher than himself; and a mean man, by one lower than himself."

"He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors."

"People are all born ignorant but they are not born stupid."

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

"Men who think that a woman's past love affairs lessen her love for them are usually stupid and weak."

"Cause when a guy does something stupid once, well that’s because he’s a guy. But if he does the same stupid thing twice, that’s usually to impress some girl."