Like Luther, he served himself heir to the work of earlier theologians; but he did not go to Occam, Biel, or D’Ailly, as the German Reformer had done. Erasmus, who had no liking for the priestly miracle in the Mass, and cared little for a rigid literal interpretation of the words of the institution, had declared that the Sacrament of the Supper was the symbol of commemoration, of a covenant with God, and of the fellowship of all believers in Christ, and this commended itself to Zwingli’s conception of the social character of Christianity; but he was too much a Christian theologian to be contented with such a vague idea of the rite. Many theologians of the later Middle Ages, when speculation was more free than it could be after the stricter definitions of the Council of Trent, had tried to purify and spiritualise the beliefs of the Church about the meaning of the central Christian rite. Foremost among them was John Wessel (_c._ 1420-1489), with his long and elaborate treatise, _De Sacramento Eucharistiæ_. He had taught that the Lord’s Supper is the rite in which the death of Christ is presented to and appropriated by the believer; that it is above all things a commemoration of that death and a communion or participation in the benefits which followed; that communion with the spiritual presence of Jesus is of far more importance than any corporeal contact with the Body of Christ; and that this communion is shared in through faith. These thoughts had been taken over by Christopher Honius, a divine of the Netherlands, who had enforced them by insisting that our Lord’s discourse in the 6th chapter of St. John’s Gospel had reproved any materialistic conception of the Lord’s Supper; and that _therefore_ the words of the institution must not be taken in their rigid literal meaning. He had been the first to suggest that the word _is_ in “This is My Body” must mean _signifies_. Wessel and Honius were the predecessors of Zwingli, and he wove their thoughts into his doctrine of the Lord’s Supper. It should be remembered that Luther had also been acquainted with the labours of Wessel and of Honius, and that so far from attracting they had repelled him, simply because he thought they failed to give the respect due to the literal meaning of the words of the institution.