How do we know we have eternal security in our salvation?

Eternal security, often referred to in Reformed theology as the preservation of the saints, indicates that true believers will persevere in their faith and cannot ultimately fall away. This assurance is based on God’s unchanging grace and the promise of Christ who intercedes for His people. In John 10:28-29, Jesus declares that no one can snatch His sheep out of His hand, which emphasizes the security that believers find in Him. This perseverance is not due to our own strength but is secured by the unction, or anointing, from the Holy Spirit that leads us to abide in Christ and His teachings.