Before Protestants were "separated brethren"...
Q. Does the Lord make use of apostate Catholics, such as Martin Luther, Calvin, John Knox, Henry VIII., King of England, to reform the manners of the people?
A. The thought is absurd. The lives of those men were evil, and it is only the devil that makes use of them to pervert the people still more. The Lord makes use of His saints, such as a St. Francis of Assisium, a St. Dominick, a St. Ignatius, a St. Alphonsus, to convert the people and reform their evil manners by explaining to them the truths of faith, the commandments, and the necessity of receiving the sacraments with proper dispositions, and by setting them in their own lives the loftiest example of faith, purity, and all Christian virtues.
Q. Are there any other reasons to show that heretics, or Protestants who die out of the Roman Catholic Church, are not saved?
A. There are several. They cannot be saved, because
1. They have no divine faith.
2. They make a liar of Jesus Christ, of the Holy Ghost, and of the Apostles.
3. They have no faith in Christ.
4. They fell away from the true Church of Christ.
5. They are too proud to submit to the Pope, the Vicar of Christ.
6. They cannot perform any good works whereby they can obtain heaven.
7. They do not receive the Body and Blood of Christ.
8. They die in their sins.
9. They ridicule and blaspheme the Mother of God and His saints.
10. They slander the spouse of Jesus Christ —:the Catholic Church.
Q. What is the act of faith of a Protestant?
A. O my God, I believe nothing except what my own private judgment tells me to believe; therefore I believe that I can interpret Thy written word—the Holy Scriptures —as I choose. I believe that the Pope is anti-Christ; that any man can be saved, provided he is an honest man; I believe that faith alone is sufficient for salvation; that good works, and works of penance, and the confession of sins are not necessary, etc.
Q. Have Protestants any faith in Christ?
A. They never had.
Q. Why not?
A. Because there never lived such a Christ as they imagine and believe in.
Q. In what kind of a Christ do they believe?
A. In such a one of whom they can make a liar, with impunity, whose doctrine they can interpret as they please, and who does not care about what a man believes, provided he be an honest man before the public.
Q. Will such a faith in such a Christ save Protestants?
A. No sensible man will assert such an absurdity.
Familiar Explanation of Christian Doctrine
For the Family and More Advanced Students in Catholic Schools (1875)
(pgs 70, 91-93, 97-98; with imprimatur)