How do we know we cannot lose our salvation?

The doctrine of eternal security is foundational in Reformed theology, asserting that true believers cannot lose their salvation. John 6:37 emphasizes that all whom the Father gives to Christ will come to Him, and He will not cast them out. Romans 8:31-39 further affirms that nothing can separate the elect from the love of God in Christ Jesus. This permanence is rooted in Jesus' sacrificial atonement, which secures the redemption of His people. Furthermore, the sufficiency of Christ's blood highlights that if any for whom He died could be lost, it would imply His sacrifice was inadequate, contradicting the very essence of the gospel.