"If Mary was thus strengthened against every movement of sin by her first sanctification, much more did grace grow in her and much more was concupiscence weakened or even completely uprooted in her, when the Holy Spirit came upon her, according to the angel’s word, to form of her the body of Christ. After she had been made the shrine of the Holy Spirit and the tabernacle of the Son of God, we may not believe that there was ever any inclination to sin in her, or that she ever experienced any pleasurable feeling of carnal concupiscence. And so we must view with revulsion the error of Helvidius who, while admitting that Christ was conceived and born of the Virgin, asserted that she later bore other sons to Joseph."