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John 9:4

I must work the works of him that sent me, whilst it is day: the night cometh, when no man can work.

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The verse in its languages

Vulgate (Clementine)
Me oportet operari opera ejus qui misit me, donec dies est : venit nox, quando nemo potest operari :
Greek New Testament (SBLGNT)
ἡμᾶς δεῖ ἐργάζεσθαι τὰ ἔργα τοῦ πέμψαντός με ἕως ἡμέρα ἐστίν· ἔρχεται νὺξ ὅτε οὐδεὶς δύναται ἐργάζεσθαι.

Haydock's commentary

Whilst it is day. That is, during all the time of this mortal life; the night comes, that is, death. (Witham)

He speaks of that night of which mention is made is St. Matthew chap. xxii. Cast him into exterior darkness. This is a night in which none can work, but only receive the reward of their labours. If you wish to work, work now whilst you live; for beyond the grave there is neither faith, nor labour, nor repentance. (St. Chrysostom, as above.)

From Haydock's Catholic Bible Commentary, 1859, in the transcription made by Todd Easton and kept online by John Paul Wohlschied at johnblood.gitlab.io/haydock.

The Fathers on this verse

St John Chrysostom Catena Aurea on verses 1-7

The Jews having rejected Christ’s words, because of their depth, He went out of the temple, and healed the blind man; that His absence might appease their fury, and the miracle soften their hard hearts, and convince their unbelief. And as Jesus passed by, He saw a man which was blind from his birth. It is to be remarked here that, on going out of the temple, He betook Himself intently to this manifestation of His power. He first saw the blind man, not the blind man Him: and so intently did He fix His eye upon him, that His disciples were struck, and asked, Rabbi, who did sin, this man or his parents, that he was born blind?

St Bede Catena Aurea on verses 1-7

Mystically, our Lord, after being banished from the minds of the Jews, passed over to the Gentiles. The passage or journey here is His descent from heaven to earth, where He saw the blind man, i.e. looked with compassion on the human race.

St Augustine Catena Aurea on verses 1-7

For the blind man here is the human race. Blindness came upon the first man by reason of sin: and from him we all derive it: i.e. man is blind from his birth.

St Augustine Catena Aurea on verses 1-7

Rabbi is Master. They call Him Master, because they wished to learn: they put their question to our Lord, as to a Master.

Theophylact Catena Aurea on verses 1-7

This question does not seem a proper one. For the Apostles had not been taught the fond notion of the Gentiles, that the soul has sinned in a previous state of existence. It is difficult to account for their putting it.

St John Chrysostom Catena Aurea on verses 1-7

They were led to ask this question, by our Lord having said above, on healing the man sick of the palsy, Lo, you are made whole; sin no more. Thinking from this that the man had been struck with the palsy for his sins, they ask our Lord of the blind man here, whether he did sin, or his parents; neither of which could have been the reason of his blindness; the former, because he had been blind from his birth; the latter, because the son does not suffer for the father. Jesus answered, Neither has this man sinned, nor his parents.

St Augustine Catena Aurea on verses 1-7

Was he then born without original sin, or had he never added to it by actual sin? Both this man and his parents had sinned, but that sin was not the reason why he was born blind. Our Lord gives the reason; viz. That the works of God should be made manifest in him.

St John Chrysostom Catena Aurea on verses 1-7

He is not to be understood as meaning that others had become blind, in consequence of their parents’ sins: for one man cannot be punished for the sin of another. But had the man therefore suffered unjustly? Rather I should say that that blindness was a benefit to him: for by it he was brought to see with the inward eye. At any rate He who brought him into being out of nothing, had the power to make him in the event no loser by it. Some too say, that the that here, is expressive not of the cause, but of the event, as in the passage in Romans, The law entered that sin might abound, the effect in this case being, you our Lord by opening the closed eye, and healing other natural infirmities, demonstrated His own power.

St Gregory the Great Catena Aurea on verses 1-7

One stroke falls on the sinner, for punishment only, not conversion; another for correction; another not for correction of past sins, but prevention of future; another neither for correcting past, nor preventing future sins, but by the unexpected deliverance following the blow, to excite more ardent love of the Savior’s goodness.

St John Chrysostom Catena Aurea on verses 1-7

That the glory of God should be made manifest, He said of Himself, not of the Father; the Father’s glory was manifest already. I must work the works of Him that sent Me; i.e. I must manifest Myself, and show that I do the same that My Father does.

St Bede Catena Aurea on verses 1-7

For when the Son declared that He worked the works of the Father, He proved that His and His Father’s works were the same: which are to heal the sick, to strengthen the weak, and enlighten man.

St Augustine Catena Aurea on verses 1-7

By His saying, Who sent Me, He gives all the glory to Him from Whom He is. The Father has a Son Who is from Him, but has none from whom He Himself is.

St John Chrysostom Catena Aurea on verses 1-7

While it is day, He adds; i.e. while men have the opportunity of believing in Me; while this life lasts; The night comes, when none can work. Night here means that spoken of in Matthew, Cast him into outer darkness. Then will there be night, wherein none can work, but only receive for that which he has worked. While you live, do that which you will do: for beyond it is neither faith, nor labor, nor repentance.

St Augustine Catena Aurea on verses 1-7

But if we work now, now is the day time, now is Christ present; as He says, As long as I am in the world, I am the light of the world. This then is the day. The natural day is completed by the circuit of the sun, and contains only a few hours: the day of Christ’s presence will last to the end of the world: for He Himself has said, Lo, I am with you always, even to the end of the world.

St John Chrysostom Catena Aurea on verses 1-7

He then confirms His words by deeds: When He had thus spoken, He spat on the ground, and made clay of the spittle, and anointed the eyes of the blind man with the clay. He who had brought greater substances into being out of nothing, could much more have given sight without the use of any material: but He wished to show that He was the Creator, Who in the beginning used clay for the formation of man. He makes the clay with spittle, and not with water, to make it evident that it was not the pool of Siloam, whither He was about to send him, but the virtue proceeding from His mouth, which restored the man’s sight. And then, that the cure might not seem to be the effect of the clay, He ordered the man to wash: And He said to him, Go, wash in the pool of Siloam. The Evangelist gives the meaning of Siloam, which is by interpretation, Sent, to intimate that it was Christ’s power that cured him even there. As the Apostle says of the rock in the wilderness, that that Rock was Christ, so Siloam had a spiritual character: the sudden rise of its water being a silent figure of Christ’s unexpected manifestation in the flesh. But why did He not tell him to wash immediately, instead of sending him to Siloam? That the obstinacy of the Jews might be overcome, when they saw him going there with the clay on his eyes. Besides which, it proved that He was not averse to the Law, and the Old Testament. And there was no fear of the glory of the case being given to Siloam: as many had washed their eyes there, and received no such benefit. And to show the faith of the blind man, who made no opposition, never argued with himself, that it was the quality of clay rather to darken, than give light, that He had often washed in Siloam, and had never been benefited; that if our Lord had the power, He might have cured him by His word; but simply obeyed: he went his way therefore, and washed and came seeing. Thus our Lord manifested His glory: and no small glory it was, to be proved the Creator of the world, as He was proved to be by this miracle. For on the principle that the greater contains the less, this act of creation included in it every other. Man is the most honorable of an creatures; the eye the most honorable member of man, directing the movements, and giving him sight. The eye is to the body, what the sun is to the universe; and therefore it is placed aloft, as it were, upon a royal eminence.

Theophylact Catena Aurea on verses 1-7

Some think that the clay was not laid upon the eyes, but made into eyes.

St Augustine Catena Aurea on verses 1-7

Our Lord spat upon the ground, and made clay of the spittle, because He was the Word made flesh. The man did not see immediately as he was anointed; i.e. was, as it were, only made a catechumen. But he was sent to the pool which is called Siloam, i.e. he was baptized in Christ; and then he was enlightened. The Evangelist then explains to us the name of this pool: which is by interpretation, Sent: for, if He had not been sent, none of us would have been delivered from our sins.

St Gregory the Great Catena Aurea on verses 1-7

Or thus: By His spittle understand the savor of inward contemplation. It runs down from the head into the mouth, and gives us the taste of revelation from the Divine splendor even in this life. The mixture of His spittle with clay is the mixture of supernatural grace, even the contemplation of Himself with our carnal knowledge, to the soul’s enlightenment, and restoration of the human understanding from its original blindness.

Tertullian Against Praxeas, Sundry Passages of St. John Quoted, to Show the Distinction Between the Father and the Son. Even Praxeas' Classic Text--I and My Father are One--Shown to Be Against Him

Again, whose doctrine does He announce, at which all were astonished? Was it His own or the Father’s? So, when they were in doubt among themselves whether He were the Christ (not as being the Father, of course but as the Son), He says to them “You are not ignorant whence I am; and I am not come of myself, but He that sent me is true, whom ye know not; but I know Him, because I am from Him.” He did not say, Because I myself am He; and, I have sent mine own self: but His words are, “He hath sent me.” When, likewise, the Pharisees sent men to apprehend Him, He says: “Yet a little while am I with you, and (then) I go unto Him that sent me.” When, however, He declares that He is not alone, and uses these words, “but I and the Father that sent me,” does He not show that there are Two, Two, and yet inseparable? Indeed, this was the sum and substance of what He was teaching them, that they were …

Origen Origen's Commentary on the Gospel of John, Chapter XXIV

He said, then, that He was the light of the world; and we have to examine, along with this title, those which are parallel to it; and, indeed, are thought by some to be not merely parallel, but identical with it. He is the true light, and the light of the Gentiles. In the opening of the Gospel now before us He is the light of men: “That which was made,” it says, “was life in Him, and the life was the light of men; and the light shines in darkness, and the darkness did not overtake it.” A little further on, in the same passage, He is called the true light: “The true light, which lightens every man, was coming into the world.” In Isaiah, He is the light of the Gentiles, as we said before. …

St Augustine Sermons on Selected Lessons of the New Testament, On the words of the Gospel, John ix. 4 and 31, ‘We must work the works of him that sent me,’ etc. Against the Arians. And of that which the man who was born blind and received his sight said, ‘We know that God heareth not sinners.’

On the words of the Gospel, John ix. 4 and 31 , “We must work the works of him that sent me,” etc. Against the Arians. And of that which the man who was born blind and received his sight said, “We know that God heareth not sinners.”

St Augustine Sermons on Selected Lessons of the New Testament, On the words of the Gospel, John ix. 4 and 31, ‘We must work the works of him that sent me,’ etc. Against the Arians. And of that which the man who was born blind and received his sight said, ‘We know that God heareth not sinners.’

1. The Lord Jesus, as we heard when the Holy Gospel was being read, opened the eyes of a man who was born blind. Brethren, if we consider our hereditary punishment, the whole world is blind. And therefore came Christ the Enlightener, because the devil had been the Blinder. He made all men to be born blind, who seduced the first man. Let them run to the Enlightener, let them run, believe, receive the clay made of the spittle. The Word is as it were the spittle, the Flesh is the earth. Let them wash the face in the pool of Siloa. Now it was the Evangelist’s place to explain to us what Siloa means, and he said, “which is by interpretation, Sent.” Who is This That is Sent, but He who in this very Lesson said, “I am come to do the works of Him That sent Me.” Lo, Siloa, wash the face, be baptized, that ye may be enlightened, and that ye who before saw not, may see.

St John Chrysostom The Homilies of St. John Chrysostom on the Gospel of St. John, John 9.1,2

Ver. 4 . “I must work the works of Him that sent Me.” That is, “I must manifest Myself, and do the things which may show that I do the same things with the Father”; not things “similar,” but, “the same,” an expression which marks greater unvaryingness, and which is used of those who do not differ ever so little. Who then after this will face Him, when he seeth that He hath the same power with the Father? For not only did He form or open eyes, but gave also the gift of sight, which is a proof that He also breathed in the soul. Since if that did not work, the eye, though perfected, could never see anything; so that He gave both the energy which is from the soul, and gave the member also possessing all things, both arteries and nerves and veins, and all things of which our body is composed. …

St John Chrysostom The Homilies of St. John Chrysostom on the Epistle to the Hebrews, Hebrews 11.13-16

[2.] And as those who are under the power of sweet sleep lie on their bed not only during the night, but even when the morning has over-taken them, and bright day has come, and are not ashamed to indulge in pleasure, and to make the season of business and activity a time of slumber and indolence, so truly we also, when the day is drawing near, when the night is far spent, or rather the day; for “work” (it is said) “while it is day” ( John ix. 4 ); when it is day we practice all that belongs to the night, sleeping, dreaming, indulging in luxurious fancies; and the eyes of our understanding are closed as well as those of our body; we speak amiss, we talk absurdly; even if a person inflict a deep wound upon us, if he carry off all our substance, if he set the very house on fire, we are not so much as conscious of it.

The Fathers are given as they wrote. Where a passage lays the Passion on the Jewish people, the Church teaches that it cannot be charged against all the Jews then living, nor against the Jews of today, and that all sinners were its authors (CCC 597, 598).