Leviticus

"And the LORD called unto Moses, and spake unto him out of the tabernacle of the congregation, saying, Speak unto the children of Israel, and say unto them, If any man of you bring an offering unto the LORD, ye shall bring your offering of the cattle, even of the herd, and of the flock." —  — Leviticus 1:1, 2 KJV.

 

In the unfolding of the Divine purposes Abraham has been isolated from his polytheistic kindred, and called to sojourn in the Land of Promise. His seed have been cast into the furnace of Egypt, and, by centuries of oppression, have been fused into a homogeneous mass now ready to be poured into the divinely prepared mould for the formation of a nationality unique and wonderful. Through a highway miraculously thrown up they have been led forth from Egypt to the foot of Sinai. Here, amid the display of all that is terrific in the elements, they have received two revelations the holiness of Jehovah and the expression of his will, in the most sublime and comprehensive code of moral laws that had ever been given to man. The purpose of both these revelations is to sanctify and elevate the nation. Both convince of sin. 

The Divine purity is a mirror wherein man may discover his moral defilements. The decalogue, by clearly drawing a fiery boundary between right and wrong by quickening the conscience and thrusting upon the unwilling soul a sense of guilt for its evil deeds, under the government of a holy God is now extorting the despairing cry, “O wretched man that I am! who shall deliver me from the body of this death?” The imperative demand of the hour through all that multitudinous host is a purgatory for their sins. For the law has entered disclosing their abounding offences. Romans 5:10.  That purgatory the merciful Lawgiver now prepares. 

An expiatory quality is now clearly developed in one of the familiar sacrifices, and others wholly propitiatory are to be instituted. The law drives the guilty to the blood. 

— Commentary on Leviticus.