A line from the movie sets the stage for the last lines. "No water for him!" is our desire for revenge.
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At the end of the movie, Judah Ben Hur describes the change that came over him when he saw the Christ and experienced a mighty change of heart. He repeats the last words of Jesus, "Father, forgive them for they know not what they do", and then Ben Hur declares "I felt his voice take the sword out of my hand."