noun /kɒnʃɛns/
Never do anything against conscience, even if the state demands it.
b) A personification of the moral sense of right and wrong, usually in the form of a person, a being or merely a voice that gives moral lessons and advices.
[“]Twer is not a friend of mine testifying against me reluctantly and for conscience’ sake, as the prosecution would have you believe. He is a spy, performing his paid job.[”]
Wikipedia foundation.