Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.
The difference between stupidity and genius is that genius has its limits.
The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.
The two most common elements in the universe are hydrogen and stupidity.
Never underestimate the power of stupid people in large groups.
There is nothing worse than aggressive stupidity.
A stupid man's report of what a clever man says can never be accurate, because he unconsciously translates what he hears into something he can understand.
If there are no stupid questions, then what kind of questions do stupid people ask? Do they get smart just in time to ask questions?
There is more stupidity than hydrogen in the universe, and it has a longer shelf life.
If fifty million people say a foolish thing, it is still a foolish thing.
In view of the fact that God limited the intelligence of man, it seems unfair that He did not also limit his stupidity.
Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so.
It's not that I'm so smart, it's just that I stay with problems longer.
Intellectuals solve problems, geniuses prevent them.
Any fool can make a rule, and any fool will mind it.
Real stupidity beats artificial intelligence every time.
The bookful blockhead, ignorantly read With loads of learned lumber in his head.
Man has made use of his intelligence; he invented stupidity.
People demand freedom of speech as a compensation for the freedom of thought which they seldom use.