The world is full of fools; and he who would not wish to see one, must not only shut himself up alone, but must also break his looking-glass.                                                                             —Nicolas Boileau

We must learn to live together as brothers or perish together as fools.                —Martin Luther King, Jr

A common mistake that people make when trying to design something completely foolproof was to underestimate the ingenuity of complete fools.                                                            —Douglas Adams

A fool may be known by six things: anger, without cause; speech, without profit; change, without progress; inquiry, without object; putting trust in a stranger; and mistaking foes for friends.

—Arabian Proverb

I am patient with stupidity but not with those who are proud of it.

—Edith Sitwell

In view of the fact that God limited the intelligence of man, it seems unfair that He did not also limit his stupidity.

—Konrad Adenauer

Mix a little foolishness with your serious plans: it’s lovely to be silly at the right moment.           —Horace

One great mistake made by intelligent people is to refuse to believe that the world is as stupid as it is.

—Madame de Tengini

People do not wish to appear foolish; to avoid the appearance of foolishness, they are willing to remain actually fools.

—Alice Walker

Rules are for the obedience of fools and the guidance of wise men.

—Douglas Bader

Sometimes one likes foolish people for their folly, better than wise people for their wisdom.         —Elizabeth Gaskell

A thick head can do as much damage as a hard heart.

—H.W. Dodds