Shared ground
These last two verses work as the Gospel’s closing “seal.” They point to a specific disciple as the testimony-source behind “these things,” and they attach a public confirmation: “we know” his witness is true. The ending also stresses that the written account is selective. Jesus did far more than what has been included here, and the final line uses deliberate overstatement (more books than the world could contain) to underline Jesus’ overflowing significance.
Where interpretation differs (only where needed)
Who is “the disciple”? Many readers identify him with the “beloved disciple” who appears earlier in the book, but the text here does not name him.
What does “wrote these things” mean? Some take the line to mean this disciple personally authored the whole book. Others read it as saying the disciple stands as the primary eyewitness source whose testimony was written down in the Gospel’s final form.
Who is the “we”? Some understand “we know” as an editorial or community voice that endorses the disciple’s testimony. Others take it as the author using a literary “we” to assert reliability.
How literal is v. 25? Most understand the world-not-containing-books line as vivid exaggeration, not a measurable claim about book-storage capacity.
Why the disagreement exists
The passage uses brief, referential language (“the disciple,” “these things,” “we”) without supplying names or describing the writing process. It also blends voices: a statement about a disciple’s testimony, followed by a group affirmation (“we know”), then a broad concluding reflection about Jesus’ deeds. Those features leave room for more than one historically plausible explanation while still communicating the same basic point about reliable witness and selectiveness.
What this passage clearly contributes
Explicitly, the text claims (1) a particular disciple testifies to the events narrated, (2) that disciple is connected to the writing of “these things,” (3) a “we” asserts the witness is true, and (4) Jesus did many other things beyond what is recorded here. By inference, the passage frames the Gospel as curated testimony rather than an exhaustive archive, and it closes by widening the reader’s horizon: the written record is meant to be trusted, yet it does not attempt to capture everything Jesus did (echoing the book’s stated selectiveness in John 20:30–31).