Why blood — from Abel, through the Passover and the altar, to the cross.
From the first pages, blood marks the cost of sin and the means of covering it: Abel's blood cries from the ground, a lamb's blood spares Israel at the Passover, and the whole sacrificial system turns on the truth that "without the shedding of blood there is no forgiveness." It all reaches toward one offering — "the blood of Christ, like that of a lamb without blemish." The trail ends with a multitude who "have washed their robes... in the blood of the Lamb."- 1
Garments of skin in the garden
Genesis 3:21And the LORD God made garments of skin for Adam and his wife, and He clothed them.
After the first sin, God himself clothes Adam and Eve with garments of skin — the first death, an innocent life given to cover their shame, foreshadowing the covering Christ would provide. - 2
Abel's blood cries out
Genesis 4:10“What have you done?” replied the LORD. “The voice of your brother’s blood cries out to Me from the ground.
The first death: innocent blood crying from the ground for justice. - 3
The blood of the Passover lamb
Exodus 12:13The blood on the houses where you are staying will distinguish them; when I see the blood, I will pass over you. No plague will fall on you to destroy you when I strike the land of Egypt.
Blood on the doorposts turns away death — Israel is spared and set free. - 4
The Day of Atonement
Leviticus 16:30because on this day atonement will be made for you to cleanse you, and you will be clean from all your sins before the LORD.
On one day a year, blood makes atonement to cleanse the people from all their sins. - 5
"Without blood, no forgiveness"
Hebrews 9:22According to the law, in fact, nearly everything must be purified with blood, and without the shedding of blood there is no forgiveness.
Hebrews names the principle running through the whole law — and the better blood that fulfils it. - 6
Redeemed by the blood of Christ
1 Peter 1:19but with the precious blood of Christ, a lamb without blemish or spot.
Peter: ransomed not with silver or gold but with the precious blood of Christ, a lamb without blemish. - 7
Robes washed in the blood of the Lamb
Revelation 7:14“Sir,” I answered, “you know.” So he replied, “These are the ones who have come out of the great tribulation; they have washed their robes and made them white in the blood of the Lamb.
The redeemed in glory are those cleansed by the Lamb's own blood.