What does Jesus mean by saying 'no man can pluck them out of my hand'?

When Jesus states that 'neither shall any man pluck them out of my hand' (John 10:28), He emphasizes the security and permanence of salvation for those who belong to Him. This statement assures believers that their salvation is safeguarded by Christ's sovereign power. Alongside this, He asserts that 'my Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand' (John 10:29), highlighting a double security in the hands of both the Son and the Father. As recipients of God’s grace, believers are eternally secure, preserved from any external threats or judgment.