In the last night of his life, Jesus prayed specifically for his followers to have unity. He said that, through unity, the disciples would bear a powerful witness to his name. Why, on the darkest night of his life, was he thinking about that? The answer is seen in his example: in unity, there is love, a sacrificial love between the Father and Son, and between all who believe in him. Christianity has survived, not because of its cleverness or power, but because of its unified love.