Charles,
Have you read Augustine's Homolies on the Gospel of John? Here are some quotes from those tractates:
Tractate XXV.
Tractate XXV.
John VI. 15-44.
10. After the sacrament of the miracle, He introduces discourse, that, if possible, they who have been fed may be further fed, that lie may with discourse fill their minds, whose bellies He filled with the loaves, provided they take in. And if they do not, let that be taken up which they do not receive, that the fragments may not be lost. Wherefore let Him speak, and let us hear. "Jesus answered and said Verily, verily, I say unto you, ye seek me, not because ye saw the signs, but because ye have eaten of my loaves." Ye seek me for the sake of the flesh not for the sake of the spirit. How many seek Jesus for no other object but that He may bestow on them a temporal benefit! One has a business on hand, he seeks the intercession of the clergy; another is oppressed by one more powerful than himself, he flies to the church. Another desires intervention in his behalf with one with whom he has little influence. One in this way, one in that, the church is daily filled with such people. Jesus is scarcely sought after for Jesus' sake. "Ye seek me, not because ye have seen the signs, but because ye have eaten of my loaves. Labor not for the meat which perisheth, but for that which endureth unto eternal life." Ye seek me for something else, seek me for my own sake. For He insinuates the truth, that Himself is that meat: this shines out clearly in the sequel. "Which the Son of man will give you." Thou didst expect, I believe, again to eat bread, again to sit down, again to be gorged. But He had said, "Not the meat which perisheth, but that which endureth unto eternal life," in the same manner as it was said to that Samaritan woman: "If thou knewest who it is that asketh of thee drink, thou wouldest perhaps have asked of Him, and He would give thee living water." When she said, "Whence hast thou, since thou hast nothing to draw with, and the well is deep?" He answered the Samaritan woman: "If thou knewest who it is that asketh of thee drink, thou wouldst have asked of Him, and He would give thee water, whereof whoso drinketh shall thirst no more; for whoso drinketh of this water shall thirst again." And she was glad and would receive, as if no more to suffer thirst of body, being wearied with the labor of drawing water. And so, during a conversation of this kind, He comes to spiritual drink. Entirely in this manner also here.
12. "They said therefore unto Him, What shall we do, that we may work the works of God?" For He had said to them, "Labor not for the meat which perisheth, but for that which endureth unto eternal life." "What shall we do?" they ask; by observing what, shall we be able to fulfill this precept? "Jesus answered and said unto them, This is the work of God, that ye believe on Him whom He has sent." This is then to eat the meat, not that which perisheth, but that which endureth unto eternal life. To what purpose dost thou make ready teeth and stomach? Believe, and thou hast eaten already. Faith is indeed distinguished from works, even as the apostle says, "that a man is justified by faith without the works of the law:"13 there are works which appear good, without faith in Christ; but they are not good, because they are not referred to that end in which works are good; "for Christ is the end of the law for righteousness to every one that believeth."14 For that reason, He willeth not to distinguish faith from work, but declared faith itself to be work. For it is that same faith that worketh by love.15 Nor did He say, This is your work; but, "This is the work of God, that ye believe on Him whom He has sent;" so that he who glories, may glory in the Lord. And because He invited them to faith, they, on the other hand, were still asking for signs by which they might believe. See if the Jews do not ask for signs. "They said therefore rate Him, What sign doest thou, that we may see and believe thee? what dost thou work?" Was it a trifle that they were fed with five loaves? They knew this indeed, but they preferred manna from heaven to this food. But the Lord Jesus declared Himself to be such an one, that He was superior to Moses. For Moses dared not say of Himself that He gave, "not the meat which perisheth, but that which endureth to eternal life." Jesus promised something greater than Moses gave. By Moses indeed was promised a kingdom, and a land flowing with milk and honey, temporal peace, abundance of children, health of body, and all other things, temporal goods indeed, yet in figure spiritual; because in the Old Testament they were promised to the old man. They considered therefore the things promised by Moses, and they considered the things promised by Christ. The former promised a full belly on the earth, but of the meat which perisheth; the latter promised, "not the meat which perisheth, but that which endureth unto eternal life." They gave attention to Him that promised the more, but just as if they did not yet see Him do greater things. They considered therefore what sort of works Moses had done, and they wished yet some greater works to be done by Him who promised them such great things. What, say they, doest thou, that we may believe thee? And that thou mayest know that they compared those former miracles with this and so judged these miracles which Jesus did as being less; "Our fathers," say they, "did eat manna in the wilderness." But what is manna? Perhaps ye despise it. "As it is written, He gave them manna to eat." By Moses our fathers received bread from heaven, and Moses did not say to them, "Labor for the meat which perisheth not." Thou promisest "meat which perisheth not, but which endureth to eternal life;" and yet thou workest not such works as Moses did. He gave, not barley loaves, but manna from heaven.
14. "And Jesus said unto them, I am the Bread of Life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst." "He that cometh to me;" this is the same thing as "He that believeth on me;" and "shall never hunger" is to be understood to mean the same thing as "shall never thirst." For by both is signified that eternal sufficiency in which there is no want. You desire bread from heaven; you have it before you, and yet you do not eat. "But I said unto you, that ye also have seen me, and ye believed not." But I have not on that account lost my people. "For hath your unbelief made the faith of God of none effect?"16 For, see thou what follows: "All that the Father giveth me shall come to me; and him that cometh to me, I will not cast out of doors." What kind of within is that, whence there is no going out of doors? Noble interior, sweet retreat! O secret dwelling without weariness, without the bitterness of evil thoughts, without the solicitings of temptations and the interruptions of griefs! Is it not that secret dwelling whither shall enter that well-deserving servant, to whom the Lord will say, "Enter thou into the joy of thy Lord?"17