Dealing with the sacrifice once offered by Christ, he describes the Mass as the Sacrifice of the Church and the Eucharist as a Sacrament. His contention was that there is a unity between Christ's sacrifice begun at the Last Supper, consummated on the Cross and Resurrection and continued in the Mass.
In discussing the Mass, he emphasizes its relationship to Christ's sacrifice, which began with the Last Supper, reached its climax on the Cross and Resurrection, and is sustained through the celebration of the Eucharist. He sees a unity between these events.