For the life of the flesh is in the blood, and I have given it for you on the altar to make atonement for your souls, for it is the blood that makes atonement by the life. (Leviticus 17:11)

All orthodox believers understand that the sacrifices of the Old Testament were typical of the one vicarious, life for life, substitutionary sacrifice of our Lord Jesus Christ. Christ is called the Lamb of God that takes away the sins of the world (Jn. 1:29), the Pascal Lamb (1 Cor. 5:7), the Sacrifice of Atonement (1 Jn. 2:2), and He who “gave Himself up for us, an offering of sacrifice to God for an odor of a sweet smell” (Eph. 5:2). This should not be disputed. But how were these ancient animal sacrifices “sufficient and efficacious, through the operation of the Spirit, to instruct and build up the elect in faith in the promised Messiah, by whom they had full remission of sins, and eternal salvation” (Westminster Confession of Faith, CH. 8.6)? A short perusal of the Book of Hebrews will help make this plain.