Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

I hate pride, but if I were going to be proud of anything it would have to be something I'd done myself. Race pride is kind of stupid.

The difference between stupidity and genius is that genius has its limits.

The more pity that fools may not speak wisely what wise men do foolishly.

Better to remain silent and be thought a fool than to speak out and remove all doubt.

Stupidity is something unshakable, nothing attacks it without breaking itself against it, it is of the nature of granite, hard and resistant.

Discipline divorced from wisdom is not true discipline, but merely the meaningless following of custom, which is only a disguise for stupidity.

Lord, what fools these mortals be!

Each of the professions means a prejudice. The necessity for a career forces every one to take sides. We live in the age of the overworked, and the under-educated; the age in which people are so industrious that they become absolutely stupid.

Stupidity often saves a man from going mad.

To be idle is a short road to death, and to be diligent is a way of life; foolish people are idle, wise people are diligent.

The skillful employer of men will employ the wise man, the brave man, the covetous man, and the stupid man.

Men are born ignorant, not stupid. They are made stupid by education.

Before God we are all equally wise - and equally foolish.

Society is not a disease, it is a disaster. What a stupid miracle that one can live in it.

Never underestimate the power of human stupidity.

I don't want to feel like I've matured. That's a stupid word that I never want to use.

The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.

Stupidity has a knack of getting its way.

Can anything be stupider than that a man has the right to kill me because he lives on the other side of a river and his ruler has a quarrel with mine, though I have not quarrelled with him?