What does the Bible teach about the perseverance of the saints?

The perseverance of the saints, often referred to as 'eternal security,' is grounded in the assurance that once a person is genuinely saved, they are sustained by God's grace to abide in faith throughout their lives. Philippians 1:6 assures us that He who began a good work in us will bring it to completion at the day of Jesus Christ. This belief is rooted in the understanding that Christ's intercession and the Holy Spirit's work within the believer safeguard their faith. Furthermore, Hebrews 10:39 encourages believers by stating that we are not of those who shrink back, affirming that genuine faith manifests in a continual trust in Jesus as the Author and Perfecter of our faith.