Motivation deriving logically from ethical or moral principles that govern a person's thoughts and actions(noun)
WordNet. Princeton University. 2010.
Use "sense of right and wrong" in a sentence
"Kathe Koja's _Buddha Boy_ (Farrar, Straus and Giroux, hardcover, $16.00, 117 pages, ISBN 0-374-30998-1) is narrated -- in a hypnotic, almost stream-of-consciousness style -- by a teen named Justin, possessed of some small artistic talents and a keen sense of right and wrong that is only partially tamped down by the conventional, thoughtlessly accepted culture of his high school."