As I see it and understand it, ethics are those things we as a humanbeings base our principles on.  Example.  A woman is being raped, we pass by, we react, we do something, we do it because a fellow is being molested.  Because it is part of our ethical make-up we jump in without thinking.  It is in us, it guides us, so we do not think. 

Laws are not always based on what many view as ethical.  Take for example the obscenity laws.  My neighbor can stand on my sidewalk or on the street and hurl every filthy epithat he wants at me and I can do anything about it, because the Supreme Court of this land has said there is no such thing as obscene, except in the eye of the beholder.

Satan has no ethics.  God does.