- “Then he shall kill the goat of the sin offering that is for the people and bring its blood inside the veil and do with its blood as he did with the blood of the bull, sprinkling it over the mercy seat and in front of the mercy seat. Thus he shall make atonement for the Holy Place, because of the uncleannesses of the people of Israel and because of their transgressions, all their sins.” (Leviticus 16:15-16)
- “He entered once for all into the holy places, not by means of the blood of goats and calves but by means of his own blood, thus securing an eternal redemption. For if the blood of goats and bulls, and the sprinkling of defiled persons with the ashes of a heifer,
sanctify for the purification of the flesh, how much more will the blood of Christ, who through the eternal Spirit offered himself without blemish to God, purify our conscience from dead works to serve the living God. Without the shedding of blood, there is no forgiveness of sins.” (Hebrews 9:13-14,22) - “In Him we have redemption through His blood, the forgiveness of our trespasses.” (Ephesians 1:7)
Forgiveness is messy. It’s not easy and it is going to cost something. The Old Testament priests worked, covered in the blood of animals, day after day to purify the Israelites. That was the only means of forgiveness available for them, but forgiveness based on the blood of animals only lasted until the next sin. 
Human guilt cannot just be covered over that easily, but must be erased by human blood. Hallelujah that our God had a plan! We can be forgiven, for every sin, permanently! Scourging, thorns, nails, He gave His blood to redeem us. It takes perfect blood of the perfect man to not just cover but remove our guilt. It is doubtful the Roman soldiers understood the true significance of their work, but Jesus did, and through Him we have true forgiveness.
Kept From Stumbling 