48 I am the bread of the life; 49 your fathers did eat the manna in the wilderness, and they died; 50 this is the bread that out of the heaven is coming down, that any one may eat of it, and not die. 51 'I am the living bread that came down out of the heaven; if any one may eat of this bread he shall live—to the age; and the bread also that I will give is my flesh, that I will give for the life of the world.' 52 The Jews, therefore, were striving with one another, saying, 'How is this one able to give us 'his' flesh to eat?' 53 Jesus, therefore, said to them, 'Verily, verily, I say to you, If ye may not eat the flesh of the Son of Man, and may not drink his blood, ye have no life in yourselves; 54 he who is eating my flesh, and is drinking my blood, hath life age-during, and I will raise him up in the last day; 55 for my flesh truly is food, and my blood truly is drink; 56 he who is eating my flesh, and is drinking my blood, doth remain in me, and I in him. 57 'According as the living Father sent me, and I live because of the Father, he also who is eating me, even that one shall live because of me; 58 this is the bread that came down out of the heaven; not as your fathers did eat the manna, and died; he who is eating this bread shall live—to the age.'
Matthew Henry's Commentary on John 6:48-58
Commentary on John 6:47-51
(Read John 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.
Commentary on John 6:52-59
(Read John 6:52-59)
The flesh and blood of the Son of man, denote the Redeemer in the nature of man; Christ and him crucified, and the redemption wrought out by him, with all the precious benefits of redemption; pardon of sin, acceptance with God, the way to the throne of grace, the promises of the covenant, and eternal life. These are called the flesh and blood of Christ, because they are purchased by the breaking his body, and the shedding of his blood. Also, because they are meat and drink to our souls. Eating this flesh and drinking this blood mean believing in Christ. We partake of Christ and his benefits by faith. The soul that rightly knows its state and wants, finds whatever can calm the conscience, and promote true holiness, in the redeemer, God manifest in the flesh. Meditating upon the cross of Christ gives life to our repentance, love, and gratitude. We live by him, as our bodies live by our food. We live by him, as the members by the head, the branches by the root: because he lives we shall live also.