(66) From that time.--The addition of the word "time" has given a definite and questionable meaning to the Greek, which is indefinite. "From that" probably means on that account, because of the words He had spoken. The actual departure was the result of the teaching, which tested their faith and found it wanting, and was at that time, not gradually from that time onwards. (Comp. Note on John 19:12.)

Many of his disciples.--Co-extensive with the same term in John 6:60.

Verse 66. - Upon this (ἐκ τούτου; cf. ἐξ οῦ, equivalent to qua propter). Not "from that time forwards," not a gradual thinning down or departure of some disciples, one today and another tomorrow, but a kind of rush and stampede took place. Those who a few hours before were ready to call him their Messianic King, were entirely disenchanted. The claims of Christ were so profoundly different from what they anticipated that upon this many of his disciples went back, and walked no more with him. The fascination those felt who had seen some of the excellences of Jesus led them to put themselves at his disposal, to wait upon him, to desert their ordinary occupations. Hence part of the phraseology of redemption was derived from the method of Christ. Men "came" to him; they "followed" him; they "walked" with him; they could "go back," desert, forsake their Lord. These actions of his first disciples have created the vocabulary of the kingdom of God. Christ's teaching tested as well as attracted men. There was a repellent force as well as an infinite fascination. He sifted as well as saved. The very deeds and words that broke some hearts into penitence roused impatient and angry remonstrance in others. There is seen in this Gospel a continual departure and a deepening faith.

6:66-71 When we admit into our minds hard thoughts of the words and works of Jesus, we enter into temptation, which, if the Lord in mercy prevent not, will end in drawing back. The corrupt and wicked heart of man often makes that an occasion for offence, which is matter of the greatest comfort. Our Lord had, in the foregoing discourse, promised eternal life to his followers; the disciples fastened on that plain saying, and resolved to cleave to him, when others fastened on hard sayings, and forsook him. Christ's doctrine is the word of eternal life, therefore we must live and die by it. If we forsake Christ, we forsake our own mercies. They believed that this Jesus was the Messiah promised to their fathers, the Son of the living God. When we are tempted to backslide or turn away, it is good to remember first principles, and to keep to them. And let us ever remember our Lord's searching question; Shall we go away and forsake our Redeemer? To whom can we go? He alone can give salvation by the forgiveness of sins. And this alone brings confidence, comfort, and joy, and bids fear and despondency flee away. It gains the only solid happiness in this world, and opens a way to the happiness of the next.From that time many of his disciples went back,.... Not any of the twelve apostles, for they are distinguished from these in the next verse; nor any of the seventy disciples, for their names were written in heaven, and could not apostatize totally and finally, as these did; but some of the multitude of the disciples, who followed Christ, heard him, and professed to believe in him, and were baptized in his name, but were not true disciples, only nominal ones: they had never heard and learned of the Father, otherwise they would have known what it was to come to Christ, as the Father's gift, and under the drawings of his grace; and would not have been offended at the words of our Lord, just now spoken by him, concerning that sort of coming to him: but from the time he spoke those words; "because of this word", as the Syriac, Arabic, and Persic versions render it; they withdrew themselves from his ministry, they dropped their profession of faith in him, and relinquished him as a Saviour and Redeemer: for finding that he would not be made king, nor set up for a temporal redeemer; and talking of himself as the bread of life, and of coming to him, in a sense they did not understand; they turned their backs on him; and as the words may be literally read, "returned to the things that were behind"; to the world, and to their old companions, to Satan and their own hearts lusts; like the dog to its vomit, and the swine to its wallowing in the mire: their true picture is drawn, in the parable of the unclean spirit going out of the man, and returning, Matthew 12:43. And they returned to their quondam teachers, the Scribes and Pharisees, and to the law of works, and to seek for righteousness by it; setting up their own righteousness, and not submitting to the righteousness of Christ; and thus to look back and draw back, is a sad case indeed:

and walked no more with him; never returned to him more, or went with him from place to place as before: never more attended on his ministry, or had any intimacy and fellowship with him: and so it commonly is with apostates from the profession of Christ; they seldom or ever return, or are recovered; it is difficult, if not impossible, which is sometimes the case, to renew them again to repentance.