John / Question
John says many believed in Jesus’ name when they saw the signs he did (John 2:23). But Jesus “did not entrust himself to them” because he knew what was in man (John 2:24–25).
In Jerusalem during Passover, many people respond positively to Jesus because they see the impressive signs he performs (John 2:23). Yet Jesus does not hand himself over to their enthusiasm. The passage explains this hesitation by pointing to Jesus’ own knowledge of people in general and of what is inside a person in particular. These verses close the Passover-in-Jerusalem episode that includes Jesus’ temple action and his cryptic saying about the temple (2:13–22).
John says many people in Jerusalem responded to Jesus positively during Passover because they saw his signs (explicit: verse 23). Their “belief” is presented as real in some sense, but it is also closely tied to what they can observe. At the same time, John says Jesus did not “entrust himself” to these believers (explicit: verse 24).
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with John 2:23, then read the surrounding section so the answer stays connected to the passage's flow.
23Now when he was in Jerusalem at the Passover, during the feast, many believed in his name, observing his signs which he did.