20 Save yourself therefore, my brother, while you have this present life, from the wrath which is to come on the obstinate and the proud. The formidable power of the authorities of this world, when it assails the truth, gives glorious opportunity of probation to the strong, but puts dangerous temptation before the weak who are righteous; but when it assists the proclamation of the truth, it is the means of profitable admonition to the wise, and of unprofitable vexation to the foolish among those who have gone astray. “For there is no power but of God: whosoever therefore resists the power, resists the ordinance of God; for rulers are not a terror to good works, but to the evil. Will you then not be afraid of the power? Do that which is good, and you shall have praise of the same.” For if the power be on the side of the truth, and correct any one who was in error, he that is put right by the correction has praise from the power. If, on the other hand, the power be unfriendly to the truth, and cruelly persecute any one, he who is crowned victor in this contest receives praise from the power which he resists. But you do not that which is good, so as to avoid being afraid of the power; unless perchance this is good, to sit and speak against not one brother, but against all your brethren that are found among all nations, to whom the prophets, and Christ, and the apostles bear witness in the words of Scripture, “In your seed shall all the nations of the earth be blessed;” and again, “From the rising of the sun even unto the going down of the same, a pure offering shall be offered unto My name; for My name shall be great among the heathen, says the Lord.” Mark this: “says the Lord;” not says Donatus, or Rogatus, or Vincentius, or Ambrose, or Augustine, but “says the Lord;” and again, “All tribes of the earth shall be blessed in Him, and all nations shall call Him blessed. Blessed be the Lord God, the God of Israel, who only does wondrous things; and blessed be His glorious name for ever, and the whole earth shall be filled with His glory: so let it be, so let it be.” And you sit at Cartennæ, and with a remnant of half a score of Rogatists you say, “Let it not be! Let it not be!”
21. You hear Christ speaking thus in the Gospel: “All things must be fulfilled which were written in the law of Moses, and in the Prophets, and in the Psalms, concerning Me. Then opened He their understanding, that they might understand the Scriptures, and said unto them, Thus it is written, and thus it behooved Christ to suffer, and to rise from the dead the third day; and that repentance and remission of sins should be preached in His name among all nations, beginning at Jerusalem.” You read also in the Acts of the Apostles how this gospel began at Jerusalem, where the Holy Spirit first filled those hundred and twenty persons, and went forth thence into Judæa and Samaria, and to all nations, as He had said unto them when He was about to ascend into heaven, “You shall be witnesses unto Me both in Jerusalem, and in all Judæa, and in Samaria, and unto the uttermost parts of the earth;” for “their sound went into all the earth, and their words unto the ends of the world.” And you contradict the Divine testimonies so firmly established and so clearly revealed, and attempt to bring about such an absolute confiscation of Christ's heritage, that although repentance is preached, as He said, in His name to all nations, whosoever may be in any part of the earth moved by that preaching, there is for him no possibility of remission of sins, unless he seek and discover Vincentius of Cartennæ, or some one of his nine or ten associates, in their obscurity in the imperial colony of Mauritania. What will the arrogance of insignificant mortals not dare to do? To what extremities will the presumption of flesh and blood not hurry men? Is this your well-doing, on account of which you are not afraid of the power? You place this grievous stumbling-block in the way of your own mother's son, for whom Christ died, and who is yet in feeble infancy, not ready to use strong meat, but requiring to be nursed on a mother's milk; and you quote against me the works of Hilary, in order that you may deny the fact of the Church's increase among all nations; even unto the end of the world, according to the promise which God, in order to subdue your unbelief, confirmed with an oath! And although you would by all means be most miserable if you stood against this when it was promised, you even now contradict it when the promise is fulfilled.
Source: Letters (New Advent)