What is the role of Christ in salvation according to Reformed theology?

Reformed theology emphasizes that Christ's role in salvation is that of the sole mediator between God and humanity. He accomplishes the redemption of God's chosen people by fulfilling the law perfectly and offering Himself as a sacrificial atonement for their sins. According to passages like Hebrews 1:3, the work of Christ is not a potential or hypothetical salvation, but a definite and successful redemption for those whom the Father has elected. This underscores the belief that His blood truly purges sins for the elect, guaranteeing their justification and acceptance before God. Furthermore, through His intercession, Christ continually advocates for the believers, affirming that their security rests not in themselves but in His finished work on their behalf.