When all the students had a cup of coffee in hand, the professor said: "If you noticed, all the nice looking expensive cups were taken up, leaving behind the plain and cheap ones. While it is but normal for you to want only the best for yourselves, that is the source of your problems and stress. Be assured that the cup itself, adds no quality to the coffee in most cases, just more expensive and in some cases even hides what we drink. What all of you really wanted was coffee, not the cup, but you consciously went for the best cups... and then began eyeing each other's cups.