Christ himself, our Pasch and Living Bread, by the action of the Holy Spirit through his very flesh vital and vitalizing, giving life to men who are thus invited and encouraged to offer themselves, their labors and all created things, together with him” (PO 5). In the celebration of the Eucharist, therefore, the greatest participation takes place in the perfect worship which Christ the high priest gives to the Father by representing and expressing the whole created order. The presbyter sees and recognizes