What is meant by everlasting redemption in the Bible?

Hebrews 9:12 mentions that Jesus entered the holy place with His own blood, having obtained eternal redemption for us. This illustrates that redemption is not merely a momentary act but a permanent solution meant to secure believers' standing before God. It means that the sacrifice of Christ was eternally significant and effective, designed to fulfill God's redemptive plan that He purposed before time began. The believer's redemption is assured because it is based on Christ's eternal work, which is unchangeable and guaranteed by God's everlasting covenant.