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

The doctrine of the preservation of the saints, often referred to as 'eternal security,' assures believers that once they are genuinely saved, they are kept secure by the power of God. This is rooted in biblical promises, such as John 10:27-28, where Jesus says, 'My sheep hear my voice, and I know them, and they follow me. And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.' This doctrine emphasizes that salvation is entirely the work of God and not dependent on human effort, as seen in Philippians 1:6, which states that He who began a good work in you will carry it on to completion until the day of Christ Jesus. It highlights the faithfulness of God in safeguarding His people and ensures that true believers will ultimately attain eternal life.