John 20:8

John 20:8. Then went in therefore the other disciple also, which came first to the sepulchre, and he saw and believed. It is certainly not a belief of the statement of Mary that is expressed in this last word. As John stood gazing on the signs which bore their silent witness that the body of Jesus had not been taken away by violent hands, the truth revealed itself to him, that Jesus had of Himself left the tomb. But even more than this is probably intended by the word ‘believed.' To receive the truth of the Resurrection was to be led to a deeper and more real faith in Jesus Himself. The uncertainties, doubts, and difficulties occasioned by the events of the days just passed disappeared from John's mind. He ‘believed' in Jesus as being what He truly was, the Son of God, the Saviour of man. The words which follow are the reflection of the Evangelist upon the ignorance manifested by himself and by Peter as to the meaning of the prophetic word. Certainly the disciples' belief in a risen Saviour was not the result of any assured conviction that the Resurrection was foretold in Scripture.