A notable method of borrowing power from another magic-wielding agency is simply to breathe its name in connexion with the spell that stands in need of reinforcement; as the name suggests its owner, so it comes to stand for his real presence.
He particularly congratulated himself on having discovered the " philosophical argument " against transubstantiation, " that the text of Scripture which seems to inculcate the real presence is attested only by a single sense - our sight, while the real presence itself is disproved by three of our senses - the sight, the touch, and the taste."
The most interesting example of this method is seen in the Tractatus de sacramento altaris where Occam accepts the doctrine of Real Presence as a matter of Faith, and sets forth a rational theory of the Eucharist (afterwards adopted by Luther) known as " Consubstantiation."
He had abandoned Luther's doctrine of consubstantiation and adopted the doctrine of a Real Presence conditioned by the faith of the recipient.
Thus the doctrine of the Real Presence is asserted, but no mention is made of Transubstantiation.
