Ali

“We both sat there mute, as if we were in a no-talking competition and serious about winning.”
― Lee Child, Personal

“No one expects a head butt. Humans don’t hit things with their heads. Some inbuilt atavistic instinct says so. A head butt changes the game. It adds a kind of unhinged savagery to the mix. An unprovoked head butt is like bringing a sawed-off shotgun to a knife fight.”
― Lee Child, The Affair

“They taught me that inhibitions would kill me. Hit early, hit hard. Kill with the first blow. Get your retaliation in first. Cheat. The gentlemen who behaved decently weren’t there to train anybody. They were already dead.”
― Lee Child, Killing Floor

“... Feral, from the Latin adjective ferus, wild, via bestia fear, wild animal. Generally held to mean having escaped from domestication, and having devolved back to a natural state.
Turner said, "It's like you've been sanded down to nothing but yes and no, and you and them, and black and white, and live or die. It makes me wonder, what does that to a person?"
"Life," Reacher said. "Mine, anyway."
"You're like a predator. Cold, and hard. Like this whole thing. You have it all mapped out. The four guys in the car, and their bosses. You're swimming toward them, right now, and there's going to be blood in the water. Yours or theirs, but there's going to be blood.”
― Lee Child, Never Go Back