John Dewey,
Human Nature and Conduct: An introduction to social psychology
“ Why does moral authority exist at all? Why is the claim of the Right recognized in conscience even by those who violate it in deed? Our opponents say that such and such a course is wise, expedient, better. But why act for the wise, or good, or better? Why not follow our own immediate devices if we are so inclined? There is only one answer: We have a moral nature, a conscience, call it what you will. And this nature responds directly in acknowledgment of the supreme authority of the Right over all claims of inclination and habit. ”
