Coincidence? or God's vision?
After Jesus is returned to the cross to die, there is a final shot where Jesus succumbs to the pain and dies. In this shot, (as they did not know until the film was developed) it unintentionally fades to white in a heavenly manner.
Was this a miraculous experience? Actually, the camera was damaged and light seeped into the film. Although Scorsese kept the effect, thinking it added a nice touch.