How do we know that true believers have eternal security?

The doctrine of eternal security for true believers is grounded in Christ’s promise that those who are His will never perish and cannot be taken from His hand. In John 10:28-29, Jesus assures His followers that no one can pluck them out of His hand or the Father's hand, implying a divine protection and assurance that confirms their place in the kingdom. Furthermore, the metaphor of a garden enclosure in Song of Solomon 4:12 symbolizes the secure relationship believers have with Christ. It demonstrates that nothing external can breach the sanctity of this relationship, ensuring that true believers are eternally secure in their salvation.