Jude 1:20

“But you, beloved, building up yourselves on your most holy faith, etc. We pray in the Holy Spirit when, pierced by divine inspiration, we seek heavenly aid to receive the goods which we cannot possess by ourselves. Therefore, the blessed Jude instructs us to build ourselves up on the foundation of holy faith, to thus join ourselves as living stones to the house of God, which is the Church; he thus commands us to keep ourselves in the love of God, so that we never presume on our own strength, but hope in the aid of divine protection. Let no one according to the dogma of Pelagius declare that he can be saved by himself, but let us all seek the coming of the Holy Spirit into us, by which inspired we may be able to pray more fervently, lest perhaps we be separated from the society of the Holy Church with those who do not have the Spirit and therefore continue to be sensual.”

“"But you, beloved." Therefore, Jude says, but you building yourselves up in your most holy faith and praying in the Holy Spirit, that is, making your own gatherings according to the teaching of the Holy Spirit in your prayers. "keep yourselves in the love of God," that is, safeguard yourselves, waiting for the mercy of our Lord that leads to eternal life.”