This is the disciple who testifies to these things and who wrote them down, and we know that his testimony is true.
In context
22Jesus said to him, “If I want him to remain until I come, what is that to you? You follow me.” 23So the word spread among the brothers that this disciple would not die. But Jesus had not said he would not die; he said, “If I want him to remain until I come, what is that to you?” 24This is the disciple who testifies to these things and who wrote them down, and we know that his testimony is true. 25There are many other things Jesus did as well. If every one of them were written down, I suppose the world itself could not hold the books that would be written.
