Dost thou believe on the Son of God? - Hitherto he had understood little of the true character of Jesus. He believed that he had power to heal him, and he inferred that he must be a prophet, John 9:17. He believed according to the light he had, and he now showed that he was prepared to believe all that Jesus said. This is the nature of true faith. It believes all that God has made known, and it is premiered to receive all that he will teach. The phrase Son of God here is equivalent to the Messiah. See the notes at Matthew 8:29.

Dost thou believe on the Son of God? - This was the same with, Dost thou believe on the Messiah? for these two characters were inseparable; see John 1:34, John 1:49; John 10:36; Matthew 16:16; Mark 1:1.

Jesus heard that they had cast him out,.... this being perhaps the first instance, of putting in execution the act they had made, John 9:22, and was a stretching of that act; which only threatened with an ejection, in case any should confess Jesus to be the Messiah; which this man had not done as yet, only had said he was a prophet, and that he was of God; it made a very great noise in the city, and the report of it was soon spread over it; and it became the talk of everyone, and so Jesus, as man, came to hear of it; though he, as God, knew it the very instant it was done, and needed not any to make report of it to him:

and when he had found him: not by chance, meeting him at an unawares, but seeking him; and knowing where he was, went to the very place, and found him in this piteous condition, abandoned by all mankind: this is an emblem of Christ's seeking after his chosen ones, both in redemption, and in the effectual calling, who are like sheep going astray, and never come to, and lay hold on Christ, till he comes first, seeks after, and apprehends them: he sends his ministers and his Gospel after them, where they are, and his Spirit into their hearts; yea, he comes himself, and enters there, and dwells in them by faith: he knows where they are, as he did Matthew the publican, Zacchaeus, and the woman of Samaria; and even though they are at the ends of the earth; and he goes and looks them up, and finds them; and he finds them in a deplorable condition, in a desert, in a waste howling wilderness, hopeless and helpless, poor and miserable, and blind and naked; in a pit wherein is no water; in the mire and clay of sin; in the paw of Satan, and under the power of darkness.

He said unto him, dost thou believe on the Son of God? the Persic version adds, "who hath healed thee": this supposes that there was a Son of God, or a divine person known by the Jews under this character, and that the expected Messiah would appear as such; and that, as such, he is the object of faith, and therefore, as such, must be God, since a creature, though ever so much dignified, or with whatsoever office invested, is not the object of faith, trust, and confidence, with respect to everlasting life and happiness: and it may be observed, that whenever Christ finds any of his people, he brings them to believe in him as the Son of God for righteousness and life: he himself is the author of faith in them, as well as the object of it; and no doubt power went along with these words, creating faith in this man: this was a most proper and pertinent question put to him in his present case, and suggests, that if he believed in the Son of God, it was no matter in what situation he was among men: since he would then appear to be a Son of God himself by adopting grace, and so an heir of God, and a joint heir with Christ; would receive the remission of his sins, openly justified in the court of conscience, as well of God, and be everlastingly saved: and this question is put by Christ, not as though he was ignorant, whether he believed in him or not; for he knew from the beginning, who would, and who would not believe in him: he that knew whether Peter loved him or not, knew whether this man believed in him or not; but this he said to draw forth the principle of faith, which was wrought in him, into act and exercise, and to direct it to its proper object. And this effect it had, as appears by what follows.

Said unto him

Omit unto him.

Dost thou believe (σὺ πιστεύεις)?

The form of the question indicates the confident expectation of an affirmative answer. It is almost an affirmation, you surely believe; you (σὺ, emphatic) who have born such bold testimony to me that they have cast you out. Note the phrase, πιστεύεις εἰς, believe on, and see on John 1:12.

Son of God

Both Tischendorf and Westcott and Hort read Son of man.

{7} Jesus heard that they had cast him out; and when he had found him, he said unto him, Dost thou believe on the Son of God?

(7) Most happy is their state who are cast furthest out of the Church of the wicked (who themselves proudly boast to be of the Church) so that Christ may come nearer to them.

9:35-38 Dost thou believe on the Son of God? Jesus sought the poor excommunicated man, revealed himself to him and was confessed. The man had lost the world, but found Christ. Observe that he believes with the heart, confesses with the mouth, and shows his faith by his homage.

9:35 Having found him - For he had sought him.

35-38. Jesus heard-that is, by intelligence brought Him.

that they had cast him out; and when he had found him-by accident? Not very likely. Sympathy in that breast could not long keep aloof from its object.

he said unto him, Dost thou believe on the Son of God?-A question stretching purposely beyond his present attainments, in order the more quickly to lead him-in his present teachable frame-into the highest truth.

9:35-38 Christ owns those who own him and his truth and ways. There is particular notice taken of such a suffer in the cause of Christ, and for the testimony of a good conscience. Our Lord Jesus graciously reveals himself to the man. Now he was made sensible what an unspeakable mercy it was, to be cured of his blindness, that he might see the Son of God. None but God is to be worshipped; so that in worshipping Jesus, he owned him to be God. All who believe in him, will worship him.