A really handy tip for finding past discussions for this kind of thing is to use google, preface your search with 'site:forums.sjgames.com' then keywords like sacrificial and deceptive. 4E has been out for a very long time now, other users love debating this stuff and tearing it to pieces and Kromm will chime in every now and then from his cloud castle to clear up misunderstandings and misinterpretations of his holy book. I've only found one or two things over the years that I've needed to clear up and
haven't been in the archives.
This thread was on the second page of google:
http://forums.sjgames.com/showthread.php?t=94448
And this one, which is closely related:
http://forums.sjgames.com/showthread.php?p=2173994