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.
The Bible provides several sources of man’s joy, but each source can in some way be directly traced back to the Lord. In today's passage, Psalm 43:4 describes God as the psalmist's “exceeding joy.” According to Psalm 16:11, there is “fulness of joy” in God’s presence. While the Bible indicates that man’s soul can be joyful in the Lord (Psalm 35:9; Isaiah 61:10), it also associates joy directly to God’s strength (Psalm 21:1). Moreover, God’s word provides a source of joy for the saint (Jeremiah 15:16). In the New Testament, the book of Romans identifies God as the saint’s source of joy, but specifically, this joy comes “through our Lord Jesus Christ” (Romans 5:11). Perhaps men lack the joy of the Lord because they disregard the Lord of their joy.