Catholics also believe that it all because of grace. So where would anyone be able to boast?
Boasting of the supremacy of the Roman Catholic church...over just filthy sinners saved by faith in Lord Jesus Christ’s atoning and finished sacrifice and, by the grace of God, who receive the unearned gift of eternal life and seal of the Holy Spirit just as valid and true as did the first Jewish believers, Peter and Paul included...before the RCC was invented.
Don’t Catholics often “boast” that they “gave us the Bible?”
yup...God gave us the bible and did so through His church...the Catholic church.