Ursula K. Le Guin

The trouble is that we have a bad habit, encouraged by pedants and sophisticates, of considering happiness as something rather stupid. Only pain is intellectual, only evil interesting. This is the treason of the artist: a refusal to admit the banality of evil and the terrible boredom of pain. If you can’t lick ’em, join ’em. If it hurts, repeat it. But to praise despair is to condemn delight, to embrace violence is to lose hold of everything else.

Ursula K. Le Guin, The Ones Who Walk Away from Omelas in New Dimensions 3, Robert Silverberg, editor.