Full Idea
Instead of modern 'imperative' notions of ethics (involving obligation, duty and rule-following), ancient ethics uses 'attractive' notions like those of goodness and worth
Gist of Idea
Ancient ethics uses attractive notions, not imperatives
Source
Julia Annas (The Morality of Happiness [1993], Intro)
Book Reference
Annas,Julia: 'The Morality of Happiness' [OUP 1995], p.4