226 The Faith of Our Fathers brass against the tyranny of earthly sovereigns and say to them: "Thus far you shall go, and no farther, and here you shall break your swelling waves" of passion; a Power that could say to them what John said to Herod: "This thing is not lawful for thee;" a Power that pointed the finger of reproof to them, even when the [232] sword was pointed to her own neck, and that said to them what Nathan said to David: "Thou art the man." She told princes that if the people have their obligations they have their rights, too; that if the subject must render to Caesar the things that are Caesar's, Caesar must render to God the things that art God's. Yes; the Church, while pursuing her Divine mission of leading souls to God, has ever been the defender of the people's rights. St. Ambrose, Archbishop of Milan, affords us a striking instance of the strenuous efforts made by the Catholic Church in vindicating the interests of the citizen against the oppression of rulers. A portion of the people of Thessalonica had committed an outrage against the just authority of the Emperor Theodosius. The offence of those citizens was indeed most reprehensible; but the Emperor requited the insult offered to him by a shocking and disproportioned act of retribution, which has left an indelible stain upon his otherwise excellent character. The inhabitants were assembled together for the ostensible purpose of witnessing a chariot race, and at a given signal the soldiery fell upon the people and involved men, women and children in an indiscriminate massacre, to the number of about seven thousand. Some time after the Emperor presented himself at the Cathedral of Milan; but the intrepid Prelate told him that his hands were dripping with the blood of his subjects, and forbade him entrance to the church till he had made all the reparation in his power to the afflicted people of Thessalonica. People affect to be shocked at the sentence of excommunication occasionally inflicted by the Church on evildoers. Here is an instance of this penalty. Who can complain of