During Jesus' time there weren't cameras to document the events of his life. Instead, his disciples and followers took time to tell his story in words. Thankfully, many of his stories were written down and preserved in the Bible where we can reread them and remember.
John is one of the authors who collected stories of Jesus and he presents evidence of Jesus's life to prove that He was the Son of God. But at the end of the book of John, he states there were many stories left untold.
"This is the disciple who testifies to these things and who wrote them down. We know that his testimony is true. Jesus did many other things as well. If every one of them were written down, I suppose that even the whole world would not have room for the books that would be written" (John 21:24-25 NIV).
Just as Jesus' followers shared their stories, we too, need to share our stories of faith with our youth so they can know, believe, and remember as well.