ISB ~ Jude 1 v3

I found it necessary:Circumstances forced Jude to caution readers against the dangers of false teachers (4, 8).

the faith:Not the personal faith of believers, but the deposit of faith that comes from the apostles and serves as the standard of orthodox teaching (Rom 6:17). The deposit is entrusted to the Church for safekeeping (1 Tim 6:20) (CCC 17075).

once for all delivered:The final installment of God’s revelation came through Christ and the Spirit in the apostolic age. See note on Heb 1:1-4.

• Vatican II thus decrees that the Church expects to receive no new public revelation from Christ before his return in glory (Dei Verbum 4).