6:51 {11} I am the {q} living bread which came down from heaven: if any man {r} eat of this bread, he shall live for ever: and the bread that I will give is my flesh, which I will give for the life of the world.
(11) Christ being sent from the Father is the selfsame unto us for the getting and keeping of everlasting life, as bread and flesh, yea, meat and drink, are to the use of this transitory life.
(q) Which gives life to the world.
(r) That is to say, whoever is truly a partaker of Christ, who is our food.
6:51 If any eat of this bread - That is, believe in me: he shall live for ever - In other words, he that believeth to the end shall be saved. My flesh which I will give you - This whole discourse concerning his flesh and blood refers directly to his passion, and but remotely, if at all, to the Lord's Supper.
6:47-51 The advantage of the manna was small, it only referred to this life; but the living Bread is so excellent, that the man who feedeth on it shall never die. This bread is Christ's human nature, which he took to present to the Father, as a sacrifice for the sins of the world; to purchase all things pertaining to life and godliness, for sinners of every nation, who repent and believe in him.
