noun
The ethical or moral sense of right and wrong, chiefly as it affects a person’s own behaviour and forms their attitude to their past actions.
Your conscience is your highest authority.
1949, Albert Einstein, as quoted by Virgil Henshaw in Albert Einstein: Philosopher Scientist, Never do anything against conscience, even if the state demands it.
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.
Consciousness; thinking; awareness, especially self-awareness.
Thus conscience does make cowards of us all; And thus the native hue of resolution Is sicklied o'er with the pale cast of thought.