Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
Genius may have its limitations, but stupidity is not thus handicapped.
Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.
The two most common elements in the universe are hydrogen and stupidity.
If Stupidity got us into this mess, then why can't it get us out?
The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.
To succeed in the world it is not enough to be stupid, you must also be well-mannered.
It’s too bad that stupidity isn’t painful.
The Cardinal is at his wit's end - it is true that he had not far to go.
There is no sin except stupidity.
There is more stupidity than hydrogen in the universe, and it has a longer shelf life.
Whenever a man does a thoroughly stupid thing, it is always from the noblest motives.
I am patient with stupidity but not with those who are proud of it.
It's so simple to be wise. Just think of something stupid to say and say the opposite.
It is so pleasant to come across people more stupid than ourselves. We love them at once for being so.
Stupidity often saves a man from going mad.
He's a fool that makes his doctor his heir.
The impenetrable stupidity of Prince George (son-in-law of James II) served his turn. It was his habit, when any news was told him, to exclaim, "Est il possible?"-"Is it possible?"
Personally, I have a great admiration for stupidity.
The difference between stupidity and genius is that genius has its limits.