"A person is watching three bricklayers working on a project together. He talks to the first bricklayer and asks him what he is doing; he answers, ‘I am laying bricks.’ He goes to the next and asks him what he is doing, and this bricklayer says, ‘I am building a wall.’ The observer then asks the third bricklayer and his answer is startlingly different, he says, ‘I'm building a cathedral.’"  --Kathleen Allen