How does the doctrine of perseverance relate to salvation?

The doctrine of perseverance of the saints is rooted in the assurance that those who are genuinely saved will endure in their faith until the end. In Philippians 1:6, Paul expresses confidence that He who began a good work in believers will carry it on to completion at the day of Christ Jesus. This doctrine emphasizes that salvation is not just a momentary act but a continuous work of God's grace in the believer's life. The faith that saves is an enduring faith, as seen in 1 John 2:19, which notes that those who depart from the faith were never truly part of the community. Thus, perseverance is both an evidence and assurance of genuine faith, and believers can trust in God’s faithfulness to uphold them through all trials.