Classicly

t is well to remind ourselves, from time to time, that "Ethics" is but another word for "righteousness," that for which many men and women of every generation have hungered and thirsted, and without which life becomes meaningless.

Certain forms of personal righteousness have become to a majority of the community almost automatic. It is as easy for most of us to keep from stealing our dinners as it is to digest them, and there is quite as much voluntary morality involved in one process as in the other.  -- Preface from the book.