text: OK, then let me be clearer. I don't understand how you can write the sentence you wrote, without some reference to the several ways in which both Christian tradition and American political and social traditions permit and even encourage taking the life of other living creatures. Do you mean "must" in a moralistic way, i.e., "we should never," or "we ought never to"? -- as opposed to its more basic meaning as an indicator of natural necessity. If so, fine; but in that case, you are no doubt interested in many other kinds of killing than this rather recherché one of assisted suicide.