"Sir, I'm a surgeon. Do you know what the aorta is? No? Do you want me to tell you how easily I could kill you just by, say, wrenching this pen between your ribs and giving it a good - hard - whack," he demonstrated the process by slapping himself on the wrist, "so that it rips upward and severs it? You'd drown in your own blood...but very slowly. Do you want some more examples? The kidneys, for one—"
"Quite enough, Janus, thank you."
— Translated quote from a Dutch action novel.
"Lots of ways to help people. Sometimes heal patients; sometimes execute dangerous people. Either way helps."
— Mordin Solus, Mass Effect 2
Wreav: I never even trusted my own mother. And now an archenemy is now suddenly my people's best friend?
Mordin: Far from it. Find you abrasive and unpleasant, personally. Will help your people nevertheless.
Wreav: But you're the one who improved the genophage.
Mordin: True, but if wanted your species dead, could have sterilized you. Bloodless, irreversible. Easy. Must be terrifying to have problem you can't defeat with shotgun. Fortunate I'm here to help.
Wreav: Just keep [Eve] alive.
Mordin: "Concern" is touching. Don't forget. Still need your tissue sample.
Wreav: Better not hurt.
Mordin: No promises.
"I've done life; now I'm doing death."
— Dr. Ramzi, The Dead Pit
"The world preferred to forget that men who knew how to heal also knew how to kill."
Knull: It's kind of odd for the Captain, isn't it? Using proper anesthesia and healing methods. He likes his victims to be awake while he's working.
Captain Snow: Why Knull, I'm hurt! After all, before I went to sea I was trained in medical college. I'm a doctor. It's my job to heal the sick and tend to the wounded.
Captain Snow: Torture is what I do for fun.
"Vena cava! Heart starter! The doctor is in! Sane!"
— Angelspit (who use this trope a lot in their art and themes), "Vena Cava"
Holmes: You’re not a soldier. You are a doctor.
Watson: No, an Army doctor, which means I could break every bone in your body, while naming them.
— Sherlock, "The Abominable Bride"