You're not gonna make it as a doctor
From "My Mentor" Season 1 Episode 2 of Scrubs
DR. COX: Hey, newbie, you know what your problem is?
J.D.: My bones hurt?
DR. COX: You're gonna what? Rescue me from loneliness with a $3 six-pack of light beer? Well, it turns out we can save people from themselves, newbie. We just treat 'em. We treat that kid with a respiratory problem and we comes back with cancer... Go ahead and treat that too.
J.D.: Well... Thanks for the pick me up.
DR. COX: Hey! Smokers, drinkers, druggies, fatties, whatever... All I'm saying is that if you keep living and dying on whether or not a person changes... well, you're not gonna make it as a doctor, that's all.
DR. COX: Say anything else to him?
DR. COX: But... you wanted to.
J.D.: Yeah, but you told me not to...
DR. COX: Geez, JD, would you be a man? Look it, if you can't stick to your convictions, you'll never gonna make it as a doctor. (In frustration, JD screams and his head explodes). I can't believe your head exploded! If your head explodes, you'll never gonna make it as a doctor. I mean, come on, you look ridiculous.