Ethics

Right speech, right action, and right livelihood—may be treated together, as collectively they make up the first of the three divisions of the path [The Noble Eightfold Path], the division of moral discipline. Though the principles laid down in this section restrain immoral actions and promote good conduct, their ultimate purpose is not so much ethical as spiritual. They are not prescribed merely as guides to action, but primarily as aids to mental purification. As a necessary measure for human well-being, ethics has its own justification in the Buddha's teaching and its importance cannot be underrated. But in the special context of the Noble Eightfold Path ethical principles are subordinate to the path's governing goal, final deliverance from suffering. Thus for the moral training to become a proper part of the path, it has to be taken up under the tutelage of the first two factors, right view and right intention, and to lead beyond to the trainings in concentration and wisdom.

~Bhikkhu Bodhi, in The Noble Eightfold Path