In John 1:31 the Baptist confesses, "I myself did not know him, but for this purpose I came baptizing with water, that he might be revealed to Israel." The immediate, literal answer to the question "What did they use to baptize at first?" is simple: water. John’s ministry used water baptism as a visible, tactile sign—an outward act that accompanied an inward call to repentance and prepared hearts to recognize the coming Messiah.
But the simplicity of the material—water—should not lead us to simplicity in meaning. For John, water baptism was a prophetic act. It signaled cleansing from sin, a public turning toward God, and a readiness to receive what God would accomplish in Christ. John’s humility in confessing that he did not yet know Jesus personally shows that the water itself does not reveal the fullness of God; rather, it points beyond itself to the One who will reveal the Father fully: Jesus, the Lamb who takes away sin.
The New Testament contrasts John’s water baptism with the greater reality Christ brings—the baptism of the Spirit and fire (see also Matthew 3). Water remains a crucial sign for the church: a means to confess repentance, to identify with Christ’s death and resurrection, and to be received into the visible body of believers. Practically, this means we treat baptism as both remembrance and witness: a humble declaration that we have turned from sin and now follow Jesus, trusting not in the element but in the One it reveals.
If you have been baptized with water, let it reawaken the purpose John declared: to make Christ known. If you are considering baptism, remember it is a step of repentance and public faith, a simple but powerful way to point others to Jesus. May the water that once marked your outward turn continually lead you inward to a deeper knowledge of Christ and to life in the Spirit—go in that grace and be encouraged to follow him more closely each day.