" Not if you know the secret,’ he countered, leaning closer. There was a slight Jack Nicholson vibe to all this. I drew back, faintly alarmed. ‘It’s simple. If you want a well-behaved goshawk, you just have to do one thing. Give ’em the opportunity to kill things. Kill as much as possible. Murder sorts them out.’ And he grinned. "

― Helen Macdonald , H is for Hawk