Defined rules

"In contrast with happiness, misery has clearly defined rules but rapture, is a somewhat unbounded state in which clear-cut definitions have no function. In comparison with sadness, joy is far more intangible and unpredictable. We all know the rules and regulations of melancholy but the perceptual patterns of carefree happiness are subtle and difficult to define."

p55, Entering the Heart of the Sun and Moon, Ngakpa Chogyam and Khandro Dechen, Aro Books Inc., 2010, 978-0965394833