Why is the concept of mediation important for Christians?

Christ's mediation is crucial for Christians as it represents His role as the intermediary who reconciles us to God. In Hebrews 9:15, we see that He is the mediator of the New Testament, meaning that through His death, He has ratified the covenant of grace. As the perfect mediator, He enables believers to have direct access to God, ensuring that our sins do not exclude us from His presence. This mediation assures us that we have peace with God because of Christ's completed work on our behalf, giving us hope and security in our salvation.