What does it mean that Christ's sheep cannot be plucked from His hand?

In John 10:28, Christ asserts that His sheep shall never perish, and that no one can snatch them out of His hand. This promise encapsulates the security of the believer in Christ. It emphasizes God's sovereign grace, suggesting that salvation, initiated and completed by God, cannot be undone by human effort or failure. This doctrine of eternal security is crucial for Christians as it reassures them that their salvation is rooted in God's power rather than their own. The assurance of enduring security encourages believers to live with confidence and trust in their salvation, knowing they are held firmly by Christ.