"Any fool with fast hands can take a tiger by the balls," Machine told Jack Halstead. "Did you know that?"
Jack began to laugh. The look Machine turned on him made him think better of it.
"Wipe that asshole grin off your face and pay attention to me," Machine said. "I am giving you instruction here. Are you paying attention?"
"Yes, Mr. Machine."
"Then hear this, and never forget it. Any fool with fast hands can grab a tiger by the balls, but it takes a hero to keep on squeezing. I'll tell you something else, while I'm at it: only heroes and quitters walk away, Jack. No one else. And I am no quitter."

-Machine's Way
by George Stark