input: [Topic] Eucharist - Presence of Christ in [Orthodox] During the Eucharist, the Priest calls down the Holy Spirit (in Greek: epiklesis) upon the gifts (the bread and the wine). They then change into the actual body and blood of Christ. The precise way in which this happens is a divine mystery. [Roman Catholic] As in Orthodoxy, the Priest invokes the Holy Spirit during the Mass. However, the consecration becomes effective through the Priest, who acts in the person of Christ. The gifts change completely into Christ's body and blood and this change is termed 'Transubstantiation' i.e. the outward appearance remains the same, but the substance changes. [Protestant] 
output: The bread and wine, being symbols, do not change substance. There are however, a wide variety of views held within Protestantism on this subject (e.g. some Anglicans accept the Catholic view, whereas Baptists deny it).