Deontology emphasizes one's duty to do a particular action because the action itself in inherently right - not due to any methodical calculations about the consequences.

Doing what is right for its own sake is the foundation of morality.

Deontology has a nonconsequentialist, absolutist  bent

Deontology recommends an action based on principles:
"Principle is justified through an understanding of the structure  of action, the nature of reason, and the operation of the will. The result is a moral command to act that does not justify itself by calculating consequences" (Boylan 88).

Greek    Roots: 
Logos: The account of      deion:  must
(What we must do)