Arise, O Lord, and judge your own cause. Remember your reproaches to those who are filled with foolishness all through the day. Listen to our prayers, for foxes have arisen seeking to destroy the vineyard whose winepress you alone have trod. When you were about to ascend to your Father, you committed the care, rule, and administration of the vineyard, an image of the triumphant church, to Peter, as the head and your vicar and his successors.
Pope Leo starts the text with a direct criticism to the Martin Luther King's action where he calls him a foolish person who is abandoning the religion. He is referring Jesus who is full of care and he himself is like a voice of Jesus who is on the earth to give people his message about the religion. To me this is a direct attack on the actions of Martin Luther by calling him a traitor who has gone against the religion. Destroying the vineyard is like destroying the religious teaching that Jesus has provided people.