The first covenant was not formally started without blood.
“THIS IS THE BLOOD OF THE COVENANT WHICH GOD COMMANDED YOU”
Jesus had to die to forgive our sins.
Where a will exists, the death of the one who made it must be established. For a will is valid only when people die, since it is never in effect while the one who made it is living. That is why even the first covenant was inaugurated with blood. For when every command had been proclaimed by Moses to all the people according to the law, he took the blood of calves and goats, along with water, scarlet wool, and hyssop, and sprinkled the scroll itself and all the people, saying “THIS IS THE BLOOD OF THE COVENANT WHICH GOD COMMANDED YOU” Hebrews 9:16-20
If the blood of animals was put it place as sacrifice to cleanse the people who have defiled themselves once a year, how much more will the Blood of Jesus Christ cleanse our conscience from dead works to serve the living God?
According to the Law all things are cleansed with blood, and without shedding of blood there is no forgiveness. Jesus Christ has been offered once to bear the sins of many and will appear again second time for salvation without reference to sin, to those who eagerly wait for Him.
Jesus did rise again after he died for 3 days because Death could not hold Him.
