As the great Confucius said, "The one who would be in constant happiness must frequently change." Flow. But we keep looking back, don't we? We cling to things in the past and cling to things in the present...Do you want to enjoy a symphony? Don't hold on to a few bars of the music. Don't hold on to a couple of notes. Let them pass, let them flow. The whole enjoyment of a symphony lies in your readiness to allow the notes to pass.