Because you are not of my sheep. He assigns a higher reason why they do not believe either in his miracles or in his doctrine. It is, because they are reprobate. We must observe Christ's design; for, since they boasted of being the Church of God, that their unbelief may detract nothing from the authority of the Gospel, he affirms that the gift of believing is a special gift. And, indeed, before that men know God, they must first be known by him, as Paul says, (Galatians 4:9.) On the other hand, those to whom God does not look must always continue to look away from him. If any one murmur at this, arguing that the cause of unbelief dwells in God, because he alone has power to make sheep; I reply, He is free from all blame, for it is only by their voluntary malice that men reject his grace. God does all that is necessary to induce them to believe, but who shall tame wild beasts? [1] This will never be done, till the Spirit of God change them into sheep They who are wild will in vain attempt to throw on God the blame of their wildness, for it belongs to their own nature. In short, Christ means that it is not wonderful, if there are few who obey his Gospel, because all whom the Spirit of God does not subdue to the obedience of faith are wild and fierce beasts. So much the more unreasonable and absurd is it, that the authority of the Gospel should depend on the belief of men; but believers ought rather to consider, that they are the more strongly bound to God, because, while others remain in a state of blindness, they are drawn to Christ by the illumination of the Spirit. Here, too, the ministers of the Gospel have ground of consolation, if their labor be not profitable to all.

Footnotes

1 - "Mais qui apprivoisera des bestes sauvages?"

Are not of my sheep - Are not my people, my followers. You do not possess the spirit of meek and humble disciples. Were it not for pride, and prejudice, and vainglory for your false notions of the Messiah, and from a determination not to believe, you would have learned from my declarations and works that I am the Christ.
As I said unto you - Compare John 8:47.

Ye are not of my sheep - Ye have not the disposition of those who come unto me to be instructed and saved: see what follows.

(9) But ye believe not, (i) because ye are not of my sheep, as I said unto you.
(9) It is no marvel that only a few believe, seeing that all men are by nature untamed beasts: yet nonetheless God has his own, which he turns into sheep, and commits them unto his Son, and preserves them against the cruelty of all wild beasts.
(i) He gives a reason why they do not believe, that is, because they are not his sheep.

But ye believe not,.... In me, as the Messiah:
because ye are not of my sheep; they were not among the sheep given him by his Father, were they, they would have come to him; that is, have believed in him, according to John 6:37, they were not the chosen of God, predestinated unto eternal life; for as many as are ordained of God to eternal happiness, do believe in God's own time, Acts 13:48; but these not being the elect of God, had not the faith of God's elect. Christ, as the omniscient God, knew this, that they were not the chosen of God; for he was present, when the names of God's elect were written in the book of life; had they been his sheep, he must have known them, for he knows all the sheep, and calls them by name; had they been given him by the Father, he must have known it, and would have owned them as such; but so it was not, and therefore they were left to hardness and unbelief:
as l said unto you: which seems to refer to what follows, since he had said before, that the sheep bear the voice of the shepherd, and follow him, and that he knows them, John 10:4. This clause is omitted in the Vulgate Latin version, and in Nonnus, but is in the Greek copies, and Oriental versions.

ye believe not, because ye are not of my sheep, as I said--referring to the whole strain of the Parable of the Sheep, (John 10:1, &c.).

Ye believe not, because ye are not my sheep. Not from lack of proof, but from a lack within themselves. If, as his sheep, they would follow (hear and obey), they would recognize him.

Ye do not believe, because ye are not of my sheep - Because ye do not, will not follow me: because ye are proud, unholy, lovers of praise, lovers of the world, lovers of pleasure, not of God.