John Overview: What is a Sign?
Spoken Gospel podcast with a photo of David and Seth

John Overview: What is a Sign?

About This Episode

The Gospel of John is structured around seven signs that build toward an eighth—the resurrection of Jesus.

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What Are the Signs in John? Reading Jesus' Miracles Through the Lens of Scripture

Show Notes

In this third installment of their walk through the Gospel of John, hosts David and Christine pause to ask a simple question before moving deeper into the narrative: what exactly is a sign? John structures the first half of his Gospel around seven of them, slowing the action only when Jesus turns toward the cross. Yet most readers reach for a modern definition of "sign" without realizing John is drawing on a thread that runs from the first chapter of Genesis to the empty tomb. This episode traces that thread.

A Word with a Story Behind It

The temptation when reading the Gospel of John is to treat the word "sign" as a synonym for "miracle." If a sign is just a flashy wonder, then John's seven signs become little more than a numbered list of impressive acts. But words do not carry meaning on their own. They carry the freight of the stories they have been used to tell. Before a reader can understand what John means by calling Jesus' miracles signs, that reader has to explore how the rest of Scripture uses the word.

When the original Greek term is traced through the Old Testament, something unusual happens. Most word studies turn up a scatter of meanings, the way the English word "run" can mean hundreds of different things depending on context. The word for "sign," however, is striking in its consistency. The same theological idea keeps showing up in the same shape. John is not coining a private vocabulary. He is reaching into a deep biblical well and pulling Jesus' ministry up out of it.

Lights, Rainbows, and Circumcision

The very first appearance of the word "sign" in Scripture is not attached to a miracle at all. In Genesis 1:14, God sets the sun, moon, and stars in the sky as signs to mark seasons and days and years. The strange thing about this is that God has already called light "day" and darkness "night" before the sun and moon exist. Day, in other words, is not the sun. Day is a reality that the sun makes visible. The sun is a sign in the sky pointing to a deeper truth about light. Likewise, the moon is not the source of darkness but a witness to the reality called night. From the opening chapter of Scripture, a sign is a visible pointer toward an invisible reality.

The pattern continues. After the flood, God hangs a rainbow in the clouds as the sign of a covenant. The promise itself, that God will not again destroy the earth by water, cannot be held or seen. So God gives a visible token. Generations later, when God makes a covenant with Abraham, he gives another sign in circumcision, this time carried not in the sky but on the body. Both signs do the same theological work. An unseen promise is made visible. A divine commitment is given a marker that human beings can point to and remember. Signatures, in fact, may take their name from this very pattern.

The Exodus as the Paradigmatic Sign

The highest concentration of the word "sign" in the Old Testament gathers in the book of Exodus. Here, God tells Moses at the burning bush that the great sign of his presence with his people will be the act of bringing them out of Egypt and back to that very mountain. The Exodus itself is the ultimate sign, and all the supporting signs cluster around it. The staff turning into a serpent, the plagues falling on Egypt's gods, the Red Sea opening before fleeing slaves, the manna in the wilderness, and the Sabbath given as a marker of the people who belong to God, are all signs confirming an invisible claim. Yahweh is with his people, he is above every other god, and he will rescue his people from evil.

This shifts the conversation in a critical direction. The signs in Exodus are miraculous, but not all signs are miracles, and not all miracles are signs. The rainbow is not a miracle. Circumcision is a surgery. The sun is a part of the natural world. What unites these signs with the plagues is not their miraculous nature but their function. Each one is a visible witness to a reality that cannot otherwise be seen. When Jesus performs a miracle and John calls it a sign, the reader is meant to hear the entire Exodus story rumbling underneath the word. The signs also reveal something about the human heart. Pharaoh's hardening shows that signs can be ignored, refused, denied. God multiplies signs in his grace, but the recipient must still respond. Signs are gifts meant to be received and participated in.

Water Into Wine and a Word Spoken from Far Away

The first sign John records is the wedding at Cana in chapter 2. John explicitly calls it the first sign and tells the reader that through it Jesus revealed his glory and his disciples put their trust in him. The miracle is generous and even festive, a wedding guest rescuing a host from social disaster. But underneath the kindness, the sign is making enormous claims. The prophet Joel had promised that when the Messianic Kingdom came, the mountains would drip with new wine. Jesus turns roughly six stone jars of ritual purification water into the best vintage at the feast. He is the bridegroom of Israel's prophetic hope arriving to remarry his people, the host of the Kingdom banquet, the one whose blood will become the ultimate cleansing for those once dependent on jars of ceremonial washing. In a single act, John signals atonement, new creation, and the divine identity of the one who works the miracle. Only God can do this.

In chapter 4 the second sign takes a different shape. A royal official begs Jesus to come heal his dying son. Jesus answers, "Unless you see signs and wonders, you will not believe." This line is often read as a rebuke, but in context it functions as a statement of fact and even of accommodation. The official does not flinch or apologize. He simply doubles down on his request. Jesus then speaks the healing word from a distance, and the official believes him at His word and starts home. The next day, when he learns that his son recovered at the very hour Jesus spoke, he and his whole household trust in Jesus. The sign confirms the invisible reality of the spoken promise. This is not God reluctantly conceding to weak humans. This is God compassionately meeting his people where they are. He never tires of giving signs.

A Pool, a Crowd, and Feet on the Water

The third sign takes Jesus to the pool of Bethesda, surrounded by five porticoes where an angel is said to stir the water and offer healing to whoever reaches it first. The setting itself reads like a parable of the Old Covenant. Five porticoes recall the five books of Moses, the law mediated by angels, offering real but limited healing to a broken people who could not heal themselves. One man has lain there thirty-eight years, never able to reach the water first. But Jesus, the living Water himself, walks up and heals him on the spot. The point is not only that Jesus is the lawgiver come in person. It is that the healing Moses pointed to is finally inexhaustible. The pool could heal one person at a time. Jesus can heal everyone who comes to him, without diminishment. As one early Christian writer put it, no number of sinners coming to the mercy of Jesus can lessen the supply.

The fourth and fifth signs are stacked together in chapter 6. Jesus feeds five thousand people in a wilderness with five loaves and two fish, the only sign that all four Gospel writers record. Then he sends his disciples across a body of water and meets them by walking on the waves, identifying himself with the divine "I Am." The pairing is unmistakable. A wilderness crowd is fed like Israel on manna. The Lord crosses the sea “as on dry ground” like God leading his people out of Egypt. The chaotic waters that the Hebrew imagination associated with hostile powers are trampled underfoot by Jesus, the Lord of the seas. And when the crowd chases Jesus across the lake hoping for more bread, he tells them plainly that he himself is the bread. The manna their ancestors ate in the wilderness was a sign pointing to him. He is the true bread that came down from heaven.

The Light of the World and the Voice That Calls the Dead

The sixth sign in chapter 9 takes nearly the entire chapter to unfold. Jesus has just claimed that he is the light of the world. Then he gives sight to a man born blind, a man who had never seen any sign at all, not the stars, not a rainbow, not a face. The new creation note rings loud and clear. The light that existed before the sun was put in the sky now reaches a man who had lived in darkness from birth, and humanity is shown its own condition in him. We are all born unable to see God. The deepest irony of the chapter is that as the once-blind man sees more and more clearly who Jesus is, the religious leaders interrogating him grow more and more blind. They cling to a misreading of Sabbath law and use it to deny what is standing in front of them. Their hardening, like Pharaoh's, only multiplies with each new sign. The Mosaic law they treasured was itself a sign pointing to Jesus, and they have allowed it to block their view of the One it described.

The seventh sign is the raising of Lazarus in chapter 11. Just before it, Jesus has claimed that no one can snatch his sheep out of his hand. The very next chapter puts that claim under the most extreme pressure imaginable, because Death itself appears to do exactly that to his friend. Jesus weeps. He loves Lazarus and his sisters deeply. Then he walks to the tomb and calls Lazarus out, not in the name of the Father, but on his own authority. Like the Father, Jesus has life in himself, and he can give that life to whomever he chooses. The seventh sign reveals everything the previous six were saying. Jesus is the Good Shepherd who pries open the jaws of Death to rescue his sheep.

The Eighth Sign and the Signs We Still Have

All seven signs build toward an eighth, the sign that closes John's Gospel and opens an eternal new week. Jesus' resurrection is the sign that vindicates every claim he ever made. Throughout the passion narrative, John quietly shows Jesus orchestrating every detail of his arrest, trial, and death. He lays down his life by his own authority. Then he picks it up again, leaving his grave clothes folded for good. Lazarus would eventually need his grave clothes a second time. Jesus would not. The good news of the Gospel is that the empty tomb is the visible witness to an invisible promise. Yahweh has come in the flesh, has entered Death itself, and has come up from the grave with life to give away.

This is why signs still matter. Honest doubt about whether God is real does not need to be answered with feelings or with an exuberant room full of worshipers. It can be answered with the sign Jesus gave us. He rose from the dead. Witnesses saw him. That truth was passed down. And the signs do not stop there. Every week at the table, the bread that fed the five thousand is extended again, and trust in Jesus is given something to taste. Every baptism is a visible picture of someone going under the water dead and coming up alive. Every act of love laid down for a brother or sister is a sign that the love of the Father is real and dwelling in his people. John writes his Gospel for one purpose, that his readers might trust that Jesus is the Messiah, the Son of God, and that by trusting him they might have his life in his name. The signs are how God in his kindness keeps making the invisible visible.

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