Activities are endless, like ripples on a stream. They end only when you drop them. Human moods are like the changing highlights and shadows on a sunlit mountain range. All activities are like the games children play, like castles being made of sand. View them with delight and equanimity, like grandparents overseeing their grandchildren, or a shepherd resting on a hill watching over his grazing flock.
— Nyoshul Khen Rinpoche