Yeah. So-- I could inject potassium chloride into a patient's IV, and it wouldn't do diddly to my emotional state. But I know that doing that to an innocent person would be a bad thing, and I know that doing bad things is, uh-- bad. And the thing that keeps me from doing things that are really bad - like, murder levels of bad - is analytical knowledge of right and wrong, an understanding that a lawless society is a crappy society, and a lack of motivation to hurt people for no reason. Not fear of being wracked with guilt during endless sleepless nights.

That's the thing that gives people the willies.