Serpents, Leprosy, and Blood
How Jesus fulfills the three signs of Moses
The three signs in Exodus 4:1–9 can be read as a miniature theology of deliverance: dominion over the serpent, cleansing from corruption, and judgment through blood.
The signs were first given to authenticate Moses as God’s appointed deliverer. But because Moses himself points forward to Christ, the signs naturally develop Christ-shaped echoes.
1. The staff and the serpent: Christ’s authority over the enemy
Moses’ shepherd’s staff represented his ordinary life, vocation, and human weakness. When surrendered to God, it became “the staff of God”:
“So Moses took his wife and sons, put them on a donkey, and headed back to the land of Egypt. In his hand, he carried the staff of God.”
—Exodus 4:20, NLT
Thrown down, the staff becomes a serpent. When Moses takes it up again, the serpent becomes a staff under his control.
That suggests several connections:
The serpent is conquered, not merely avoided
The first biblical enemy appears as a serpent in Genesis 3. God had already promised:
“He will strike your head, and you will strike his heel.”
—Genesis 3:15, NLT
Moses taking the serpent by the tail demonstrates divine authority over the power people naturally fear. Jesus fulfills this more completely by defeating Satan, sin, and death.
“The Son of God came to destroy the works of the devil.”
—1 John 3:8, NLT
The instrument of fear becomes an instrument of deliverance
The serpent does not simply disappear. Under God’s authority, it becomes a staff again—the very instrument through which the Red Sea will part and Israel will be delivered.
That is a deeply Christian pattern: God takes what represents death and transforms it into an instrument of salvation. The cross was Rome’s instrument of humiliation and death, yet God made it the instrument of redemption and victory.
“In this way, he disarmed the spiritual rulers and authorities. He shamed them publicly by his victory over them on the cross.”
—Colossians 2:15, NLT
Moses had to grasp what he feared
God tells Moses to reach out and take the serpent by the tail. Humanly, that is the dangerous end to grab. The sign teaches that deliverance would not come through Moses’ natural ability, but through obedience to God’s command.
Prophetically, this resembles Christ entering fully into our condition—confronting sin, temptation, suffering, and death—yet remaining victorious over them.
There may also be an echo of the bronze serpent:
“As Moses lifted up the bronze snake on a pole in the wilderness, so the Son of Man must be lifted up.”
—John 3:14, NLT
The serpent symbolized the curse, yet when lifted up according to God’s command, it became associated with healing. Likewise, Christ bore the curse without becoming sinful.
“For God made Christ, who never sinned, to be the offering for our sin.”
—2 Corinthians 5:21, NLT
2. The diseased and restored hand: Christ cleanses what sin has corrupted
Moses places his hand inside his cloak, near his chest, and it emerges diseased. He places it back, and it is restored.
The hand represents action, strength, work, and human ability. Moses had just been protesting that he was incapable of fulfilling God’s call. God shows him that human strength can become useless in a moment—and can be restored just as quickly by divine power.
Corruption comes from within
The hand goes into Moses’ cloak, near the heart, and comes out diseased. While the text does not explicitly interpret the location symbolically, it creates a meaningful biblical connection:
“For from the heart come evil thoughts, murder, adultery, all sexual immorality, theft, lying, and slander.”
—Matthew 15:19, NLT
Sin is not merely an external problem. The corruption that manifests in our actions originates within the human heart.
The sign may therefore picture the gospel diagnosis: humanity does not merely need better behavior; humanity needs inward cleansing and restoration.
Jesus touches and cleanses the unclean
Biblical skin disease made a person ceremonially unclean and separated them from the community. Yet Jesus repeatedly touched people with leprosy rather than being contaminated by them.
“Jesus reached out and touched him. ‘I am willing,’ he said. ‘Be healed!’ And instantly the leprosy disappeared.”
—Matthew 8:3, NLT
Ordinarily, uncleanness spreads from the diseased person to the clean person. With Jesus, the movement is reversed: His holiness spreads to the unclean.
That is one of the most beautiful gospel connections in the sign. Christ does not simply pronounce us forgiven from a distance. He enters our uncleanness and restores us.
The same hand is diseased and healed
God does not discard Moses’ hand and give him another one. He restores the same hand.
That anticipates resurrection rather than replacement. God’s redemptive purpose is not merely to abandon broken creation but to heal, restore, and renew it.
“And the one sitting on the throne said, ‘Look, I am making everything new!’”
—Revelation 21:5, NLT
Not necessarily “making all new things,” but making all things new.
3. The water and the blood: life, judgment, sacrifice, and covenant
The Nile was Egypt’s source of life, fertility, wealth, and national security. Turning its water into blood was therefore more than an impressive miracle. It was a declaration that Egypt’s gods, economy, power, and life-source were subject to Yahweh.
What Egypt trusted for life becomes an announcement of death
Water ordinarily signifies life. Blood poured upon dry ground signifies life emptied out in death.
“For the life of the body is in its blood.”
—Leviticus 17:11, NLT
This sign warns that a created thing worshiped as the source of life can become an instrument of judgment. Egypt trusted the Nile, but only God is the true source of life.
This connection reaches forward to Jesus:
“Anyone who is thirsty may come to me! Anyone who believes in me may come and drink!”
—John 7:37–38, NLT
Egypt’s water becomes blood in judgment. Christ gives living water through His blood in redemption.
Blood announces both judgment and salvation
In Exodus, blood has a double meaning.
For Egypt, blood means judgment: the Nile turns to blood, and death comes upon the firstborn.
For Israel, blood means protection:
“When I see the blood, I will pass over you.”
—Exodus 12:13, NLT
The same holy God confronts sin and provides refuge. The blood declares both that death is deserved and that a substitute has been provided.
That reaches its fulfillment in Christ:
“For Christ, our Passover Lamb, has been sacrificed for us.”
—1 Corinthians 5:7, NLT
Water and blood appear together at the cross
John makes a deliberate point that when Jesus’ side was pierced, both blood and water came out:
“One of the soldiers, however, pierced his side with a spear, and immediately blood and water flowed out.”
—John 19:34, NLT
John later returns to this imagery:
“And Jesus Christ was revealed as God’s Son by his baptism in water and by shedding his blood on the cross—not by water only, but by water and blood.”
—1 John 5:6, NLT
The precise relationship should not be forced, but the biblical resonance is striking. In Exodus, water becomes blood as a sign of judgment. At Calvary, blood and water flow from the pierced Messiah as the place where judgment is borne and cleansing is released.
There are also communion motifs hear as we partake in the blood of Christ through the wine and Jesus’ first miracle was turning water to wine.
The three signs form a gospel revelation
Taken together, they can be seen as addressing humanity’s three great enemies:
The serpent — Satan and spiritual bondage
The disease — sin’s inward corruption
The blood — judgment and death
Christ answers all three:
He defeats the serpent.
He cleanses the sinner.
He bears judgment through His blood and conquers death.
“Because God’s children are human beings—made of flesh and blood—the Son also became flesh and blood. For only as a human being could he die, and only by dying could he break the power of the devil, who had the power of death.”
—Hebrews 2:14, NLT
So the combined gospel truth is this:
The authority of the serpent is broken and the disease of sin is healed when the sentence of death is answered by blood.
In other words…
THE DISEASE OF THE SERPENT IS HEALED BY THE BLOOD OF GOD
Another profound pattern: the signs move closer to the person.
There is also an escalating intimacy in the signs:
The first sign happens on the ground before Moses.
The second sign happens in Moses’ own body.
The third sign involves blood, the source of life.
God is revealing that His authority extends over:
the spiritual enemy,
the human body,
and life itself.
Nothing is outside His dominion.
The escalation also moves from a reversible warning to irreversible judgment:
The serpent becomes a staff again.
The diseased hand is healed.
But the water poured onto the ground becomes blood and is not said to return to water.
That may anticipate Pharaoh’s progression. Mercy and warning are offered first, but persistent unbelief eventually hardens into judgment.
The signs reveal the nature of the true Deliverer
Moses feared that Israel would not believe God had sent him. God answered by giving signs of:
authority over evil,
the power to restore,
and the price of freedom
Those are precisely the qualities displayed in Jesus’ ministry. He cast out demons, healed the unclean, forgave sins, and warned of coming judgment. His miracles were not merely displays of power; they were signs that the greater Exodus had begun.
Moses delivered one nation from one Pharaoh. Jesus delivers humanity from the deeper Pharaohs of Satan, sin, and death.
The three signs are therefore not a full prophecy of the crucifixion in the strict sense, but they are powerful gospel-shaped shadows:
The serpent will be conquered.
The unclean will be restored.
And blood will mark the way of deliverance.
