A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.
Experience keeps a dear school, but fools will learn in no other.
Go on, get out. Last words are for fools who haven't said enough.
I have great faith in fools; self-confidence my friends call it.
Impossible is a word to be found only in the dictionary of fools.
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.