John 1:43 shows Jesus calling Philip to follow—another disciple call, following the pattern of disciples first following Jesus after John's testimony.

In John 1:41, Andrew immediately finds his brother after following Jesus — showing the natural outcome of hearing John's testimony: personal witness.

In John 4:39-42, Samaritans believe through the woman's testimony and then hearing Jesus themselves — mirroring how John's testimony here leads disciples to follow.