How do we know that Christ will not lose any of His people?

John 6:39 states, 'And this is the Father's will which hath sent me, that of all which he hath given me, I should lose nothing, but should raise it up again at the last day.' This verse assures believers that Christ's commitment to safeguard His followers is unwavering. The doctrine of the preservation of the saints reinforces this promise, teaching that those truly chosen by God will be sustained in their faith until the end. The assurance that our salvation is secure rests in Christ's divine authority and His covenantal faithfulness—He will resurrect and transform all whom the Father has given Him. Therefore, believers can rest confidently in the hope of eternal life with Christ.