Why is the concept of Christ as the mediator important for Christians?

The importance of Christ as the mediator lies in the necessity of mediation for salvation. According to Hebrews 9:15, Christ is the mediator of a new covenant, which allows believers to receive the promised eternal inheritance. This mediation establishes a bridge between sinful humanity and a holy God, allowing for the forgiveness of sins and the restoration of relationship. Without this mediatorial role, there would be no means by which we could approach God or enter into fellowship with Him, making it a cornerstone of the Christian faith.