John 6:55

(vii. de Trin. c. 14) Of the truth then of the body and blood of Christ, no room for doubting remains: for, by the declaration of our Lord Himself, and by the teaching of our own faith, the flesh is really flesh, and the blood really blood. This then is our principle of life. While we are in the flesh, Christ dwelleth in us by His flesh. (c.14:19) And we shall live by Him, according as He liveth. If then we live naturally by partaking of Him according to the flesh, He also liveth naturally by the indwelling of the Father according to the Spirit. His birth did not give Him an alien or different nature from the Father.

"For My flesh is true meat, and My blood is true drink." What is that He saith? He either desireth to declare that this is the true meat which saveth the soul, or to assure them concerning what had been said, that they might not suppose the words to be a mere enigma or parable, but might know that it is by all means needful to eat the Body.

"For my flesh," saith He, "is meat indeed, and my blood is drink indeed." For whilst by meat and drink men seek to attain to this, neither to hunger nor thirst, there is nothing that truly affords this, except this meat and drink, which doth render them by whom it is taken immortal and incorruptible; that is, the very fellowship of the saints, where will be peace and unity, full and perfect. Therefore, indeed, it is, even as men of God understood this before us, that our Lord Jesus Christ has pointed our minds to His body and blood in those things, which from being many are reduced to some one thing. For a unity is formed by many grains forming together; and another unity is effected by the clustering together of many berries.

(super Joan. c. xxvi. 15) By this meat and drink then, He would have us understand the society of His body, and His members, which is the Church, in the predestined, and called, and justified, and glorified saints and believers. The Sacrament whereof, i. e. of the unity of the body and blood of Christ, is administered, in some places daily, in others on such and such days from the Lord's Table: and from the Lord's Table it is received by some to their salvation, by others to their condemnation. But the thing itself of which this is the Sacrament, is for our salvation to every one who partakes of it, for condemnation to none. To prevent us supposing that those who, by virtue of that meat and drink, were promised eternal life, would not die in the body, He adds, And I will, raise him up at the last day; i. e. to that eternal life, a spiritual rest, which the spirits of the Saints enter into. But neither shall the body be defrauded of eternal life, but shall be endowed with it at the resurrection of the dead in the last day. (Tr. xxvi. 17) Or thus: Whereas men desire meat and drink to satisfy hunger and thirst, this effect is only really produced by that meat and drink, which makes the receivers of it immortal and incorruptible; i. e. the society of Saints, where is peace and unity, full and perfect. On which account our Lord has chosen for the types of His body and blood, things which become one out of many. Bread is a quantity of grains united into one mass, wine a quantity of grapes squeezed together.

He had said above, Whoso eateth My flesh and drinketh My blood, hath eternal life: and now to show the great difference between bodily meat and drink, and the spiritual mystery of His body and blood, He adds, For My flesh is meat indeed, and My blood is drink indeed.