“Then likewise he sprinkled with blood both the tabernacle and all the vessels of the ministry. And according to the law almost all things are purified with blood, and without shedding of blood there is no remission. Therefore, it was necessary that the copies of the things in the heavens should be purified with these, but the heavenly things themselves with better sacrifices than these. For Christ has not entered the holy places made with hands, which are copies of the true, but into heaven itself, now to appear in the presence of God for us; not that He should offer Himself often, as the high priest enters the Most Holy Place every year with blood of another—He then would have had to suffer often since the foundation of the world; but now, once at the end of the ages, He has appeared to put away sin by the sacrifice of Himself” (Hebrews 9:21-26).
Once the Old Testament’s tabernacle had been carefully constructed according to the pattern shown to Moses on Mount Sinai (Exodus 25-40), it was not ready for use until its contents and priests had been duly consecrated (Leviticus 8-9). The consecration of almost everything in the tabernacle required the blood of an animal sacrifice.
In a similar manner, when God sought to initiate the New Testament’s heavenly sanctuary as authorized in His new will and testament, it required Christ’s life blood to cleanse and sanctify its priests.
Jesus’ death to inaugurate God’s last will and testament was most certainly necessary.