They [the Gnostics] abstain from the Eucharist and from prayer, because they do not believe the Eucharist to be the flesh of our Savior Jesus Christ.… Those, therefore, who speak against this gift of God, incur death. Ignatius (c. 105, E), 1.89. We do not receive these as common bread and common drink. Rather, Jesus Christ our Savior, having been made flesh by the Word of God, had both flesh and blood for our salvation. So, likewise, we have been taught that the food which is blessed by the prayer
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