An Antidote for All Doctrinal and Liturgical Folly
"We must make oblation to God, and in all things be found pleasing to God the Creator, in sound teaching, in sincere faith, in firm hope, in ardent love, as we offer the firstfruits of the creatures that are his. The Church alone offers this pure oblation to the Creator when it makes its offering to him from his creation, with thanksgiving. We offer him what is his, and so we proclaim communion and unity and profess our belief in the resurrection of flesh and spirit. Just as bread from the earth, when it receives the invocation of God, is no longer common bread but the Eucharist, made up of two elements, one earthly and one heavenly, so also our bodies, in receiving the Eucharist, are no longer corruptible, for they have the hope of resurrection." Irenaeus of Lyons, "Against Heresies" 4.18.2, ca. 180 A.D.
The image above is a Byzantine chalice, ca. 1000 A.D.