It's funny how belief works. Peter and John are threatened by the Sanhedrin to stop telling the Good News of the Lord, but they refuse to obey. They know they are witnesses to the most significant event in Salvation history, and they can't keep quiet. When Mary Magdalene and the two disciples on the road to Emmaus tell the other disciples that they have seen the Lord, they don't believe until they see Him for themselves. The disciples begin to believe once they have encountered the Lord. This personal encounter is as real today as it was then. I can witness to you how I have seen the Lord at work in my life and the lives of others. I have seen Him move mountains, perform miracles. I can tell you all of this, but until someone has their encounter with the Lord, they are just words. A personal relationship with the Risen Christ is what gives them meaning.