“Passion has little to do with euphoria and everything to do with patience. It is not about feeling good. It is about endurance. Like patience, passion comes from the same Latin root: pati. It does not mean to flow with exuberance. It means to suffer.”
― House of Leaves
Euphoric Autonomy, Ervay Theater, Dallas, Texas
Bill Chance 
Likewise: compassion is not sentimentality. It is, literally, “to suffer with.”