Hebrews 10:10 By the which will we are sanctified through the offering of the body of Jesus Christ once for all
QUOTE: For this reason it is completely false to believe as many Protestants do, that we somehow "re-sacrifice" Christ at each Mass. Rather we simply offer up the same sacrifice at Calvary, which is re-presented in a real and literal way during the Mass. The Sacrifice at Calvary was so perfect, that it is Eternal and with no end.
Plain, simple, obvious, clear-cut. The twisting of "Tradition" above smacks of Gnosticism.
But since we are quoting Scripture, let's look at this. If all sacrifice is dead and useless and really over and done with then why does Paul not three chapters later, say:
Through Jesus, therefore, let us continually offer to God a sacrifice of praise--the fruit of lips that openly profess his name. - Hebrews 13:15