Since God is the rightful recipient of man’s sacrifices, then, by necessity, He is the only One who can rightfully provide the rules for the administration of the sacrifices. In the Old Testament, God established rules about the place (Joshua 22:29) and purity (Malachi 1:8, 14) of man’s sacrifices. Men who violated these rules, choosing rather to adopt their own rules of sacrifice and worship, often suffered harsh consequences, including death. The sacrifice of Christ for sin has changed many details of God’s demands for sacrifice; it has not, however, changed the fact that man must do things God’s way. God’s rules for sacrifice whether performed in the past, present, or future are to be dictated by scripture.
God demands righteousness, and when man fails to meet His standards, He calls for the shedding of blood for the remission of sins (Hebrews 9:22). Throughout the Old Testament, sacrifices majored on the blood of animals, but these animal sacrifices could never take away sins (Hebrews 10:4). God, in mercy, sent His Son to give “himself for us an offering and a sacrifice to God for a sweetsmelling savour” (Ephesians 5:2). Unlike the Old Testament sacrifices, the Lord Jesus was a single onetime sacrifice that offered forgiveness of sin for all and to all. In shedding His blood, the Lord Jesus Christ became man’s sacrifice, and man need look no further than the shed blood of Christ for the means by which God is satisfied.
From the Old Testament to the New Testament, many things change; however, some themes remain constant. One such theme involves the Lord's desire to use pure things and pure people. God commanded His people in the Old Testament to make sure the things used in the tabernacle were purified (Leviticus 8:15). He also commanded that His servants be purified (Ezra 6:20). In the New Testament, the apostle Paul confirmed the continuation of this theme by saying that “pureness” approved him as a minister of God (2 Corinthians 6:4-6). God still requires those who serve to strive to live pure and holy lives. Impurities hinder the Lord’s effectiveness in our lives though we may not be aware of the hindrance.