1 John 1:8

Not that we say or pretend we have no sin; [4] thus truth would not be in us, and we should even make God a liar, who has declared all mankind guilty of sin. We were all born guilty of original sin; we have fallen, and still frequently fall into lesser sins and failings. We can only except from this number our Saviour Christ, who, even as man, never sinned, and his blessed Virgin Mother, by a special privilege, preserved from all kind of sin: and of whom St. Augustine[5] says, "that for the honour of our Lord, when we speak of the holy Virgin Mary, he will have no mention at all made of any sin." (Witham)

[BIBLIOGRAPHY]

Quoniam peccatum non habemus, &c. By which are confuted the errors of the Pelagian heretics, who denied original sin, and pretended that men by their natural strength could and did live free from all sins.

[BIBLIOGRAPHY]

St. Augustine, lib. de Nat. et Gra. chap. xxxvii. Excepta S. V. Maria, de qua propter honorem Domini, nullam prorsus, cum de peccato agitur, haberi volo mentionem.