"In the Old Testament also there was show-bread; but this, as it belonged to the Old Testament, has come to an end; but in the New Testament there is Bread of heaven, and a Cup of salvation, sanctifying soul and body." Source: St. Cyril of Jerusalem, Catechetical Lectures
“In the communion, preceded by the Lord's prayer and the breaking of the bread, the faithful receive ‘the bread of heaven’ and ‘the cup of salvation,’ the body and blood of Christ who offered himself ‘for the life of the world’: Because this bread and wine have been made Eucharist (‘eucharisted,’ according to an ancient [...]
"We shall only understand it in heaven. What a pity! If we could conceive a little of the grandeur and happiness of Communion, we would desire life only to have the happiness of making Jesus Christ our daily bread. All created things would be as nothing." Source: St. John Vianney, The Meditations of the [...]
"The Bread of Heaven came down on earth that He might feed the hungry." Source: St. Cyril of Jerusalem, Catechetical Lectures