"I suspect it is very useful. You want only the knack of translating its 
lessons into the real world. For example," the Constable said, plucking his 
napkin from his lap and crushing it into the tabletop, "let us take something 
very concrete, such as beating the bejesus out of people." He stood up and 
tromped out into the garden. Nell ran after him.
"I have seen you doing your martial-arts exercises," he said, switching to a 
peremptory outdoor voice, an addressing-the-troops voice. "Martial arts means 
beating the bejesus out of people. Now, let us see you try your luck with 
me."