“We have problems perceiving nonevents.  We are blind to what does not exist.  We realize if there is a war, but we do not appreciate the absence of war during peacetime.  If we are healthy, we rarely think about being sick.  Or, if we get off the plane in Cancún, we do not stop to notice that we did not crash.  If we thought more frequently about absence, we might well be happier.” ~ Rolf Dobelli, The Art of Thinking Clearly