John 1:7
The same came for a witness, to bear witness of the Light, that all men through him might believe.
Cross-reference
John 1:9 identifies 'the true light' that John testified about, making explicit what the light is.
John 1:19 records the testimony John gave — fulfilling the witness purpose stated in John 1:7.
John 1:26 contains John's testimony about baptizing with water and the unknown one — part of his witness to the light.
John 1:27 continues his testimony, describing the one whose sandal he is unworthy to untie — pointing to the light.
John 1:32-34 climaxes his witness, identifying Jesus as the Son of God — the light he came to testify about.
In John 1:36, John the Baptist fulfills his witness role from 1:7 by directly pointing to Jesus as 'the Lamb of God'.
John 1:15 records John's actual testimony — the specific content of the witness introduced in John 1:7.
John 1:31 explains John's baptizing purpose: to reveal Jesus to Israel — the same revealing mission described as witness in John 1:7.
In John 5:33-35, Jesus confirms John's witness role, calling him 'a lamp that burned and gave light'.
John 3:26-36 expands on John's testimony, explaining his role as forerunner who must decrease while Jesus increases.
John 12:36 urges belief in the light — directly continuing the light metaphor from John 1:7 where John witnesses to the light so all may believe.
John 5:35 calls John the Baptist a 'lamp' giving light — echoing his role as witness to the true Light from John 1:7.
Malachi 3:1 prophesies a messenger who will prepare the way — the same role John the Baptist fulfills as a witness to the light in John 1:7.
Luke 3:4 quotes Isaiah about a voice preparing the way — the prophetic role John the Baptist fulfills as the witness in John 1:7.
Luke 1:77 describes John's purpose: giving knowledge of salvation through forgiveness — parallel to John 1:7's aim that through his witness all might believe.
Isaiah 43:10 calls Israel God's witnesses so people may know and believe — the same witness-to-belief pattern John fulfills as a witness to the light.
Acts 19:4 summarizes John's witness: he baptized repentance and told people to believe in Jesus, fulfilling the purpose in 1:7.