Definition:
Eternal Redemption refers to the everlasting deliverance from sin and its consequences, achieved through the sacrificial death and resurrection of Jesus Christ. This concept is central to Christian theology, emphasizing the permanence and completeness of salvation for those who believe in Christ.

Biblical Foundation:
The concept of Eternal Redemption is primarily derived from the New Testament, where it is articulated in the context of Christ's atoning work. Hebrews 9:12 in the Berean Standard Bible states, "He entered the Most Holy Place once for all, not by the blood of goats and calves, but by His own blood, thus securing eternal redemption." This verse highlights the sufficiency and finality of Christ's sacrifice, contrasting it with the repeated and temporary sacrifices of the Old Covenant.

Theological Significance:
Eternal Redemption underscores the belief that salvation is not a temporary or conditional state but a permanent reality for believers. It assures Christians of their secure position in Christ, as their sins have been fully atoned for by His blood. This assurance is rooted in the understanding that Christ's sacrifice was once and for all, eliminating the need for continual offerings for sin.

Old Testament Foreshadowing:
While the term "Eternal Redemption" is not explicitly used in the Old Testament, the sacrificial system established under the Mosaic Law foreshadows the ultimate redemption through Christ. The annual Day of Atonement (Yom Kippur) involved the high priest entering the Holy of Holies to offer sacrifices for the sins of the people. These rituals pointed to the need for a perfect and final sacrifice, which was fulfilled in Jesus.

New Testament Fulfillment:
The New Testament presents Jesus as the fulfillment of the Old Testament sacrificial system. In Ephesians 1:7, Paul writes, "In Him we have redemption through His blood, the forgiveness of our trespasses, according to the riches of His grace." This passage emphasizes that redemption is a gift of grace, accomplished through the blood of Christ, and results in the forgiveness of sins.

Implications for Believers:
Eternal Redemption has profound implications for the life of a believer. It provides assurance of salvation, as seen in John 10:28-29, where Jesus declares, "I give them eternal life, and they will never perish. No one can snatch them out of My hand. My Father who has given them to Me is greater than all. No one can snatch them out of My Father’s hand." This security in Christ encourages believers to live in freedom from the bondage of sin and to pursue holiness, knowing that their redemption is secure.

Contrast with Temporal Redemption:
Unlike temporal redemption, which might imply a limited or conditional deliverance, Eternal Redemption is characterized by its unending nature. It is not subject to the fluctuations of human faithfulness but is grounded in the finished work of Christ. This distinction is crucial in understanding the nature of salvation as presented in the New Testament.

Conclusion:
Eternal Redemption is a cornerstone of Christian doctrine, affirming the complete and everlasting nature of the salvation offered through Jesus Christ. It assures believers of their secure standing before God and calls them to live in the light of this profound truth.