Drink ye all of this. For this is my blood of the new testament, which shall be shed for many unto remission of sins. Do this for a commemoration of me. But in them there is made a commemoration of sins every year. For it is impossible that with the blood of oxen and goats sin should be taken away.
All animal offerings are 'impure' sacrifices.
Christ's sacrifice was once for all. For Christ our pasch is sacrificed. The Passover lamb was an actual sacrifice. This implies that Christ's body is also an actual, 'real' sacrifice to be consumed. By him therefore let us offer the sacrifice of praise always to God, that is to say, the fruit of lips confessing to his name.