How to Stay Saved - Jude 20-21

"But you, beloved building yourselves up in your most holy faith and praying in the Holy Spirit, keep yourselves in the love of God, waiting for the mercy of our Lord Jesus Christ that leads to eternal life." The main point in these verses is "keep yourselves in the love of God." There are two things you should do to help you keep your salvation according to Jude:

1. Build yourself up in the faith. God promises to keep and preserve the faith of His people, but we have to work as partners with God by energizing on own faith (typically, through Bible study, fellowship with believers, and worship of God).
2. Praying in the Holy Spirit. Pray with the leading of the Holy Spirit and in harmony with God rather than for what you want for yourself.

When you do these two things then you will persevere until the time that Jesus returns and your body is resurrected to eternal life.