Why is the blood of Christ a token of the covenant?

The blood of Christ is central to the covenant of grace as it represents the ultimate sacrifice made for the atonement of sins. Just as the blood of the Passover lamb was a token that marked the households of the Israelites, ensuring their safety during God's judgment, the blood of Jesus Christ is the distinguishing mark of all who are saved. This blood, shed for the elect, signifies that God's justice has been satisfied. Romans 5:9 and Ephesians 1:7 affirm that through His blood, we have redemption and forgiveness of sins, thus highlighting the blood as a crucial element of the covenant. It assures believers that they are marked as children of God and are secured in His grace.