Animal sacrifices under the Old Covenant only covered sin; they never removed it. The Hebrew kaphar, behind Yom Kippur, means to cover over, and most Old Testament uses refer to covering or atoning for sin with the life blood of a bull, goat, or ram. Hebrews 10:4 says the blood of bulls and goats cannot take away sins. They smoothed sin over and hid it, but did not fully forgive it, cleanse the guilt, or forget it as the New Covenant does. The reason is one of value: a lesser life cannot redeem a greater one. Sin brings the penalty of death on a man, so the price must be worth at least as much as he is, and animals, however many, fall short, just as twenty clunkers cannot buy a Porsche. Only the life of the Creator, Jesus Christ, was costly enough to pay for everyone's sins and still have value to be raised again. The Day of Atonement ritual in Leviticus 16 foreshadows Him. The bull covers the priest and his house. The Lord's goat is killed as a sin offering, and its blood cleanses and sanctifies priest, sanctuary, altar, and people. Its carcass is burned outside the camp, just as Christ suffered outside the gate. The Azazel goat bears the people's sins away, picturing their complete removal. The high priest, Christ, does all the work.

The Old Covenant sacrificial system involved the slaughter of bulls, sheep, goats, and turtle doves at an altar, along with non-bloody offerings of grains and fruits, all presented as acts of worship before God. Certain sacrifices were burned entirely, others shared, and some required accompaniment by additional offerings. Although the literal slaying of animals appears archaic, the principles involved remain relevant under the New Covenant, since all Scripture was written for learning and hope. Sacrificial offerings began with Adam and Eve, but the first recorded instance came from Cain and Abel, whose offering was accepted because he followed God's instructions with faith. The burnt offering required an unblemished male chosen from one's own small herd, an animal often named and bound to the family through shared experiences. The offerer laid a hand on the animal's head to transfer identity, then killed it by slitting its throat before the altar, an act that symbolically represented cutting one's own throat and giving a life rather than merely ending one. This emotional closeness illustrated that the sacrifice stood for the self offered to God. The same principle extends to the New Covenant requirement of presenting one's body as a living sacrifice, offering continual praise through the fruit of the lips, doing good, and sharing, all of which please God. These standards demand placing loyalty to Jesus Christ above family and self, living by faith as one crucified with Him, and giving one's all in ongoing relationship with God.

Every detail of the sacrificial system points to Jesus Christ in some way: each animal, of every specified species, age, and gender, testifies to the Savior in some facet. The sin offering is only one of several offerings Christ fulfilled. The other offerings also involved death, whether of an animal or a harvested product, but they do not picture sin or its payment; in them a life was given for a different purpose. Limiting Christ's sacrifice to the sin offering blinds us to the fullness of God's purpose. Scripture pictures Jesus as a lamb more than any other animal, fittingly, since a lamb represents quiet, accepting submission in suffering. Yet lambs filled a wide variety of symbolic roles: the Passover meal, redemption of the firstborn, the daily morning and evening sacrifices, the peace offering, the sin and trespass offerings, sanctifying the priesthood, cleansing after childbirth and from leprosy, concluding a Nazirite vow, and the Sabbath, new moon, and annual festival offerings. Because each lamb served a different role according to its instructions, a New Testament reference to a lamb must be read in context. That lambs served both Passover and the sin offering does not make those roles identical. On the Day of Atonement, two goats together formed a single sin offering. One cleansed the sanctuary, and the live azazel goat bore the nation's confessed sins away, and Christ fulfilled both actions. Satan has no part in it. Christ's death also served as the covenant victim who inaugurated the New Covenant, a role distinct from His role as the ultimate sin offering.

God was well pleased with Abel's animal sacrifice, as recorded in Hebrews 11, where it still witnesses to His approval. This act demonstrates that mankind's dominion over animals extended to taking their lives for sacrificial purposes. It is evident that they understood the concept of sacrificing, and some sacrifices, such as the sin offering and the peace offering, were required by God to be eaten, at least in part. This shows that God was not overly concerned about the killing of an animal for such purposes, affirming the responsibility and authority given to man over animal life within His creation.

Animal sacrifices, as part of the broader theme of sacrifice, fall short in their ability to inspire true obedience to God. No animal life holds the same value as a human life, and though the loss of a pet may bring grief, an animal's sacrificial death lacks the profound impact needed to motivate meaningful change in the offerer. Unlike the sacrifice of Jesus Christ, the sinless God-Man, animal sacrifices cannot produce a lasting desire to turn from sin or establish a deep, personal relationship with the Creator. Their inherent weakness lies in their inability to match the transformative power of a human sacrifice, specifically that of Jesus Christ, whose death carries the weight to cleanse sin and establish a New Covenant.

Sacrifice to God appears at the very start, in Cain and Abel, and this is where the subject of clean and unclean is introduced without being stated directly. It arises in a universal setting, before Israel or the Old Covenant existed. The detailed instructions in Leviticus 1 through 7 fit this context: every sacrifice had to be a clean animal or bird. Some sacrifices were eaten by the offerer or the priest, or symbolically by God as the altar fires consumed them. This indicates that God Himself eats only what is clean, and if that is good enough for God, it is right for us. The flesh offerings also represented Jesus Christ in some aspect of His work on mankind's behalf. Because His life was free from any defilement of sin, the sacrifices that represented Him had to be clean. Spiritually we eat Christ, so these things are linked. Sacrifices continue in the same form in the future. Ezekiel 40 through 48 is at least Millennial in application, and it may reach into the period after the second resurrection. There the same kinds of sacrifices are offered by the descendants of the same Levitical priests who served under the Old Covenant. Clean remains clean and unclean remains unclean, because God does not change.