Q79. Why then does Christ call the bread his body and the cup his blood, or the new covenant in his blood?

Christ has good reason for these words. He wants to teach us that as bread and wine nourish our temporal life, so too his crucified body and poured-out blood truly nourish our souls for eternal life.1 But more important, he wants to assure us, by this visible sign and pledge, that we, through the Holy Spirit's work, share in his true body and blood as surely as our mouths receive these holy signs in his remembrance,2 and that all of his suffering and obedience are as definitely ours as if we personally had suffered and paid for our sins.3