[Question:]{.underline} Can grace be received by those who attend the New Mass?
[Answer:]{.underline} This follows directly from the above. Those who attend the New Mass are not all in mortal sin, and many do not even commit any subjective sin at all in attending the New Mass, given that they do not understand the disorder or that they have a choice. Consequently, they place no obstacle to grace in attending the New Mass.
Furthermore, the Mass is efficacious ex opere operato, which means in and of itself. As long as it is validly offered up, it produces grace for the assistants. The objective defect in the ceremonies and their meaning, as grave as it might be for the profession of the Faith, cannot in itself prevent the Mass from giving grace. It is only the subjective sins of the persons who attend that can be such an obstacle.
Hence we can both say that the New Mass is evil, and also that there are good people who attend it in good faith, and who still receive grace from it all the same.
Answered by Father Peter Scott, SSPX.