John 8:12 - Meaning and Application

The rest of the chapter shows Christ in debate with stubborn sinners who objected to his kindest words. We are not told for sure whether these disputes happened the same day the woman caught in adultery was released, but that seems likely. The Gospel writer mentions no other day, and he notes that Jesus began that day early (John 8:2).

The Pharisees who had accused the woman had slipped away, but other Pharisees were still there to confront Christ (John 8:13). They had enough boldness, or shamelessness, to stand by their side after some of their own group had been put to open shame. In fact, that shame may have pushed them to press Christ even harder, hoping to rescue their side’s honor.

Here we have a great truth, along with the response it drew. Jesus said, “I am the light of the world” (John 8:12). Though he had already spoken much to them with little effect, and though they had pushed back against him, he spoke again, for God speaks “once, yes, twice.” They had ignored him, yet he still declared himself the light of the world.

Jesus Christ is the light of the world. Some Jewish teachers said that “light” was a name for the Messiah, the promised Savior. God is light, and Christ is the image of the invisible God, so he reflects that light perfectly. He was promised as a light to shine on the Gentiles, that is, the non-Jewish nations, and so he is the light of the whole world, not only of the Jewish people (Luke 2:32).

The sun is the visible light of the world, and Christ is the Sun of righteousness. One sun gives light to the whole earth, and one Christ gives spiritual light to all who receive him. There is no need for another. When Christ calls himself the light, he shows both what he is in himself, glorious and excellent, and what he is to the world, the source of all true light. Without the sun, the world would be a dark prison. Without Christ, it would be just as dark, for he is the one through whom light came into the world (John 3:19).

From this truth comes a clear lesson. “He who follows me” means someone who follows Christ the way a traveler follows light on a dark night. That person “will not walk in darkness, but will have the light of life.” If Christ is the light, then it is our duty to follow him. We must submit to his guidance and take our directions from him in everything that leads to happiness. Many people follow false lights, like misleading fires that lead travelers to destruction. Christ, however, is the true light.

It is not enough just to look at this light or admire it. We must follow it, believe it, and walk in it. It is a light for our feet, not our eyes only. Those who follow Christ will not be left without the teaching they need to stay out of deadly error. They will also have the guidance they need to stay away from sin that destroys. They will have the light of life, meaning the knowledge and enjoyment of God that gives spiritual life in this world and everlasting life in the next.

Then comes the Pharisees’ objection, and it was weak and childish: “You are testifying about yourself; your testimony is not true” (John 8:13). They were assuming the usual suspicion people have about self-praise. We often distrust what people say about themselves, and that tendency is rooted in self-love. Still, their objection was unfair.

They treated as a fault what was necessary in the case of one bringing a divine message. Moses and the prophets testified about themselves when they declared that they were God’s messengers. Even the Pharisees had asked John the Baptist, “What do you say about yourself?” Also, they ignored the other witnesses that supported Christ’s words. If he had been the only one speaking for himself, their doubt would have had some force. But his teaching was backed by more than enough trustworthy testimony.

Christ answers their objection in John 8:14. He does not turn their attack back on them, though he could have said, “You claim to be holy men, but your witness is not true.” Instead, he calmly defends himself. He had set aside reliance on his own testimony in John 5:31, but here he stands by it, because it does not weaken the other proofs. It is needed to show their full force. Christ is the light of the world, and light proves itself.

He gives three reasons why his testimony, even about himself, is true and weighty. First, he is fully aware of his own authority and completely sure of it. He does not speak as someone who is unsure or guessing. He says, “I know where I came from and where I am going.” He knew his mission from start to finish. He knew whose work he was doing and how it would end. He knew what he was before he came into the world and what he would be after, that he came from the Father and was returning to the Father (John 16:28). He came from glory and was going back to glory (John 17:5).

This gives comfort to all true Christians. The world may not know them, just as it did not know Christ, but they can still know where their spiritual life comes from and where it is heading. They can walk on sure ground.

Second, the Pharisees were not fit judges of him or of his teaching. They were ignorant, and worse, they chose to stay ignorant. Christ said, “You cannot tell where I came from or where I am going.” What good is it to argue with people who know nothing about the matter and do not want to know? He had told them that he came from heaven and was returning to heaven, but they treated that as nonsense. That is the way the natural mind responds to spiritual truth (Psalm 92:6). They presumed to judge what they did not understand and what was far outside their experience. Those who reject Christ’s rule and honor speak evil of what they do not know (Jude 1:8, 10).

Third, they were partial in their judgment: “You judge according to the flesh” (John 8:15).

When fleshly wisdom is the rule, and people judge only by outward appearance, they judge in a worldly way. The same thing happens when secular interests decide spiritual matters, or when people favor what pleases the sinful mind and wins praise from the world. A judgment cannot be right if the rule behind it is wrong. The Jews judged Christ and his gospel by appearances, and because he seemed so humble, they thought he could not be the light of the world. It was as foolish as saying the sun is no sun just because a cloud hides it.

Christ also showed that he did not act against them as a civil ruler. “I judge no man” means, “I am not here to manage your political affairs, and my teaching does not interfere with your civil rights or government powers.” If he did not deal in worldly power, it was very wrong for them to judge him by worldly standards and treat him like an enemy of the state. The words can also mean, “I do not judge now, at my first coming; that judgment is reserved for my return” (John 3:17). The first coming of Christ was for healing, not for sentencing.

His testimony about himself is fully supported by his Father, who stands with him and for him (John 8:16). “If I do judge, my judgment is true.” He did judge in his teaching (John 9:39), though not as a political ruler. If he judges, his judgment is true because he has authority, because all things were given to him, and because he is the Son of God with the Spirit of God. If he were to judge in that moment, his judgment would condemn them, but that was not yet the day of final judgment. So for now, he says, “I judge no man.”

What makes his judgment beyond challenge is that he is not alone. He acts with the Father. He has the Father’s wise counsel with him, just as he shared in the Father’s counsel before the world began. The Father was with him in the world as he carried out those plans, and never left him without direction. He also had the Father’s power with him to approve and confirm what he did. He did not act on his own, but in his own name and his Father’s, and by the authority given to him.

The Father also sent him. God goes with the one he sends. He said to Moses, “Come, and I will send you,” and also, “I will certainly be with you” (Exodus 3:10, 3:12). So if Christ had a commission from the Father, and the Father was present with him in all he did, his judgment was certainly true and valid. No legal objection could stand against it, and no appeal could be made from it.

If we look at him as a witness, his testimony is also true and above objection. He was not yet taking the throne of judgment, but he was bearing witness, and that witness was reliable. He refers to a rule in the Jewish law: the testimony of two men is accepted as true (John 8:17). That does not mean every such testimony is true in itself, since people can join together to lie, as Jezebel and others did (1 Kings 21:10). But the law treats two witnesses as enough evidence to form a just verdict. The law required two witnesses in serious cases, even in capital cases (Deuteronomy 17:6; Deuteronomy 19:15; Numbers 35:30). That requirement was meant to protect life, not destroy it.

Christ applies that rule to himself: “I am one who bears witness about myself, and the Father who sent me bears witness about me” (John 8:18). Here are two witnesses. In human courts, a person is usually not allowed to testify for himself. But in a matter that is wholly divine, God himself must be the witness. If the rule of two or three witnesses is pressed here, then there are no witnesses greater than the eternal Father, the eternal Son, and the eternal Spirit. If the testimony of two ordinary people is enough, then surely the Son of God’s testimony about himself, supported by the Father’s testimony, should be accepted (1 John 5:7, 5:9-11).

This also shows that the Father and the Son are distinct persons, since their testimonies are spoken of separately. Yet they are also one in power and glory, and so one in substance. Augustine used this passage to warn against two errors. Sabellianism made the persons in the Godhead the same person in different forms. Arianism denied the full Godhead of the Son and the Spirit. The Father is one person, and the Son is another, yet they are not two beings. The Father is the same true God as the Son.

Christ speaks here of himself and the Father as witnesses to the world. He gives evidence to the reason and conscience of human beings, whom he treats as responsible people. These same witnesses will one day stand against those who keep refusing to believe, and their word will judge people. This was the heart of the first exchange between Christ and these worldly-minded Jews. At the end of it, their tongues were set loose, but their hands were held back.

First, their tongues were set loose, because hell stirred up their malice to question his words. Though nothing in what he said showed human trickery, only divine calm and certainty, they still tried to trap him with questions. There is no one more hopelessly blind than a person who has decided not to see. They dodged his words with a question: “Where is your Father?” They could easily have understood that when he spoke of his Father, he meant God himself. But they pretended to take him as speaking of an ordinary man. Since he appealed to his Father’s witness, they asked him to produce this witness and challenged him to show where he was. In this, as Christ had said of them, they judged after the flesh (John 8:15).

They may also have meant to sneer at the lowliness and obscurity of his family: “Where is your Father, who could speak for you in a case like this?” In that way they brushed him off with a taunt when they could not answer the wisdom and power of his words.

He answered their objection with a deeper warning. He did not tell them where his Father was. Instead, he said they were choosing to remain blind: “You know neither me nor my Father.” It was useless to talk to them about God, because they spoke about divine things as blind people speak about colors. They were poor souls, ignorant of the very thing they were arguing about.

He charges them with ignorance of God: “You do not know my Father.” In Judah, God was known (Psalm 76:1), and they had some knowledge of him as the Creator of the world. But their eyes were darkened, so they could not see the light of his glory shining in the face of Jesus Christ. Even the little children in the Christian church know the Father, and know him as Father (1 John 2:13). These Jewish rulers did not, because they refused to know him in that way.

He also shows the real reason for their ignorance of God: “If you had known me, you would have known my Father also.” People are ignorant of God because they do not know Jesus Christ. If we knew Christ, we would know the Father, since Christ is the exact image of the Father’s person (John 14:9). Chrysostom uses this to prove that Christ is truly God and equal with the Father. We cannot say, “The one who knows a man knows an angel,” or “The one who knows a creature knows the Creator.” But the one who knows Christ knows the Father.

Through Christ we are taught the knowledge of God and brought into friendship with him. If we knew Christ better, we would know the Father better. But where the Christian faith is despised and fought against, people soon lose even their natural ideas about God and set them aside. Deism, the belief in God without Christ, makes room for atheism, which is the denial of God. Those who refuse to learn from Christ become empty in their thoughts about God.

Second, see how their hands were tied, even though their tongues were set loose. This was the power of heaven holding back the malice of hell. Jesus spoke these bold words of warning and correction in the treasury, a room in the temple where the chief priests, whose religion was tied to money, were usually present and attending to the income of the temple.

Christ taught in the temple, sometimes in one place and sometimes in another, as he saw fit. The priests had a strong interest in the temple and treated it as their own domain. With the help of the temple guards, they could easily have seized him and handed him over to the anger of the crowd, or at least silenced him there. Amos, though allowed in Judah, was forbidden to prophesy in the king’s chapel (Amos 7:12, Amos 7:13). Yet even in the temple, where they were close enough to reach him, no one laid hands on him, because his hour had not yet come.

See here the restraint placed on his enemies by an unseen power. None of them dared touch him. God can set limits on human anger, just as he sets limits on the waves of the sea. So we should not fear danger when we are walking in duty, because God has Satan and all his servants in chains.

See also the reason for this restraint: his hour had not yet come. This repeated phrase reminds us how much the time of our death depends on God’s fixed plan and purpose. That hour will come, and it is coming. It had not come yet, but it was near. Our enemies cannot bring it sooner, and our friends cannot delay it longer, than the time appointed by the Father. That is a great comfort to every good person, who can look up and say with joy, “My times are in your hands,” and better there than in our own. His hour had not yet come because his work was not finished and his witness was not yet complete. There is a time for all of God’s purposes.