What does John 2:23 mean?
Jesus would come to Jerusalem at least three times a year, as required for all Jewish males living in the area (Deuteronomy 16:16). These festivals were Passover (Unleavened Bread), Pentecost (Weeks), and Tabernacles (Booths).After His resurrection, the disciples recognized Jesus' prediction from verse 19. This was further proof of His message. In the same way, people in Jerusalem are beginning to see the evidence which points to Jesus as the Messiah. In the gospel of John, there are seven specific "signs," or miracles, used to demonstrate that Jesus is God.
Unfortunately, most would reject what they saw in Jesus. A person's "name" was symbolic of their authority and power, which is why we use signatures—our names—for certifying important documents. However, many of the people who "believed in His name," were only interested in the miracles, not the message, as verse 24 explains. There is a huge difference between knowing something is true, and putting trust in what you know. Many who followed Jesus at this point are interested in entertainment, but they aren't committed to His message.