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.
A tender heart quickly and readily yields when offered correction; however, as a heart becomes hardened, the times of yielding become fewer and farther apart. During the hardening process, the individual finds the true nature of the heart more difficult to grasp. As the heart further hardens, the individual finds himself involved in further defiance. The mischief may start as seemingly insignificant, but a hardening heart will ultimately lead to greater depths of wickedness, some seemingly unimaginable only a short time ago. Some of the worst sins committed in the Bible by God's people were committed by those who shortly before had displayed a tender heart. Yet, they allowed their hearts to be hardened by the deceitfulness of sin.
