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

A mother takes twenty years to make a man of her boy, and another woman makes a fool of him in twenty minutes.

A person who spends more than he earns is a fool

A wise man can learn more from a foolish question than a fool can learn from a wise answer.

Any fool can criticize, condemn, and complain but it takes character and self control to be understanding and forgiving.

Anyone who makes up their mind about an issue before they hear the issue is a fool.

Experience keeps a dear school, but fools will learn in no other.

Failure is unimportant. It takes courage to make a fool of yourself.

Fine clothes may disguise, but silly words will disclose a fool.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

Go on, get out. Last words are for fools who haven't said enough.

Go then if you must, but remember, no matter how foolish your deeds, those who love you will love you still.

He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave.

I have great faith in fools; self-confidence my friends call it.

I'd rather be an optimist and a fool than a pessimist and right.

If at first you don't succeed, try, try again. Then quit. No use being a damn fool about it.

Impossible is a word to be found only in the dictionary of fools.

It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt.

Science is what we have learned about how to keep from fooling ourselves.

The first principle is that you must not fool yourself and you are the easiest person to fool.

The heart of a fool is in his mouth, but the mouth of a wise man is in his heart.

The white man is very clever. He came quietly and peaceably with his religion. We were amused at his foolishness and allowed him to stay. Now he has won our brothers, and our clan can no longer act like one. He has put a knife on the things that held us together and we have fallen apart.

The young people think the old people are fools - but the old people know the young people are fools.

Three things have been difficult to tame: the oceans, fools, and women. We may soon be able to tame the oceans; fools and women will take a little longer.

We must live together as brothers or perish together as fools.

Wise men speak because they have something to say; Fools because they have to say something.

You may turn into an archangel, a fool, or a criminal ? no one will see it. But when a button is missing?everyone sees that.