早期教会圣人——罗马的革利免
1世纪罗马主教革利免（Clement of Rome）宣讲唯独藉信称义：
“Whosoever will candidly consider each particular, will recognize the greatness of the gifts which were given by him. For from him have sprung the priests and all the Levites who minister at the altar of God. From him also [was descended] our Lord Jesus Christ according to the flesh. From him [arose] kings, princes, and rulers of the race of Judah. Nor are his other tribes in small glory, inasmuch as God had promised, ‘Thy seed shall be as the stars of heaven’. All these, therefore, were highly honored, and made great, not for their own sake, or for their own works, or for the righteousness which they wrought, but through the operation of His will. And we, too, being called by His will in Christ Jesus,are not justified by ourselves, nor by our own wisdom, or understanding, or godliness, or works which we have wrought in holiness of heart; but by that faith through which, from the beginning, Almighty God has justified all men; to whom be glory for ever and ever. Amen.”
（来源：ANF: Vol. I, The Apostolic Fathers, First Epistle of Clement to the Corinthians, Chapter 32）
罗马教怎样回应？
“任何人若说罪人唯独藉信称义，他就当受咒诅。”
——罗马教派1547年天特会议（Council of Trent，又译“特伦托会议”）
罗马教派偏离了大公教会信仰，分裂了教会
16世纪的宗教改革运动（Reformation），无非是西方公教会里的博学之士主张回归13世纪被阿奎纳败坏前的古公教会信仰，也就是圣使徒和古教父的信仰。比如，藉信称义的教义是每一位古教父所宣讲的，包括罗马主教革利免（Clement of Rome）、爱任纽（Irenaeus）主教、安布罗修（Ambrose）大主教、奥古斯丁（Augustine）主教、屈梭多模（John Chrysostom）大主教等。
Protestants are true Catholics.
Romanists are schismatics.