More like discarding it. Even the Bible points out that Jesus' sacrifice was "a perfect sacrifice, to which nothing ever need be added". Then the washtowel harps on us needing to sacrifice ourselves, and offer the fruitages of the lips (sure sounds like something is being added here). We need to cultivate a self sacrificing spirit, despite that Jesus' sacrifice was supposed to be "a perfect sacrifice, to which NOTHING ever need be added". To me, that totally defeats the purpose of even having a sacrifice that is supposed to be perfect--along with the sacrifices offered before Jesus.
And that assessment doesn't even account for that, why the need for the sacrifice in the first place?