"We become one Body, and members of His flesh and of His bones... . This is effected by the food which He has freely given us, desiring to show the love which He has for us." Source: St. John Chrysostom, Homily 46
"He calls Himself, the bread of life, because He maintains our life both which is and which is to be, and says, Whosoever shall eat of this bread shall live for ever. By bread He means here either His saving doctrines and the faith which is in Him, or His own Body; for both nerve [...]
"For when He gave them bread, and filled their bellies, they said that He was a Prophet, and sought to make Him a King: but when He taught them concerning spiritual food, concerning eternal life, when He led them away from objects of sense, and spoke to them of a resurrection, and raised their thoughts [...]