John 1:31 explains why John the Baptist was baptizing with water: he was preparing the way so that Jesus would be made known to the people of Israel. In this verse John says he did not recognize Jesus at first, and that his whole ministry of baptizing existed for the purpose of revealing him. The verse is spoken by John the Baptist, who is speaking to the crowds and to the religious leaders who had come to question him.
I didn’t know him, but for this reason I came baptizing in water: that he would be revealed to Israel.”
John 1:31 (WEB)
What John 1:31 Means
The verse begins with John admitting, “I did not know him.” This is a striking statement from a man who was the cousin of Jesus, according to the Gospel of Luke. John is saying that his knowledge of who Jesus was did not come from family ties or personal acquaintance. It came from God’s revelation, which he goes on to describe in the verses that follow.
The phrase “for this reason I came baptizing in water” tells you the purpose behind John’s entire public work. Baptism with water was a sign of repentance and a call to prepare one’s heart. John was not starting a movement for its own sake. He was pointing ahead to someone greater. The phrase “that he would be revealed to Israel” shows that the goal of the baptizing was to make the Messiah visible to God’s covenant people.
What the verse does not promise is a full explanation of everything John will later say about Jesus. It simply states the reason for John’s ministry at this point in the story. It also does not claim that John knew every detail of Jesus’ identity before the moment of recognition described in the verses after it.
The Context of John 1:31
The Gospel of John was traditionally attributed to the apostle John, and it was written for a mixed audience of Jewish and Gentile readers who needed to understand who Jesus is. The first chapter moves quickly from the eternal Word to the testimony of John the Baptist, showing how the Old Testament hope was pointing toward Christ. Verse 31 sits in the middle of a passage where John testifies to the crowds about Jesus.
Just before verse 31, John has pointed to Jesus as “the Lamb of God” and as one who was before him, even though he came after him in time. Just after verse 31, John describes seeing the Spirit descend on Jesus like a dove. Reading verse 31 between these two moments shows that John’s admission of not knowing Jesus is what sets up the sign from heaven that confirms his identity.
Key Phrases in John 1:31
Isaiah 40:3
The voice of one who calls out, “Prepare the way of the LORD in the wilderness! Make a level highway in the desert for our God.
(WEB)
This prophecy describes a voice in the wilderness preparing the way of the Lord. The Gospel writers connect it to John the Baptist, and it helps explain why John saw his work as clearing the path for someone greater.
Luke 3:4
As it is written in the book of the words of Isaiah the prophet, “The voice of one crying in the wilderness, ‘Make ready the way of the Lord. Make his paths straight.
(WEB)
Luke quotes the same prophecy and applies it to John’s ministry. Reading it alongside John 1:31 shows how the Gospels understood John’s role as the forerunner who prepares people for the coming of the Lord.
A Short Prayer From John 1:31
Father, you make your Son known in your own time and in your own way. Thank you that you did not leave John to guess who the Messiah was, and that you gave him a sign to confirm the truth. Help me to be faithful in the work you have given me, even when I cannot see the whole picture. Make me ready to point others toward Jesus, and give me patience to wait for what you will reveal next. Amen.
