Leviticus Chapter 1

Of holocausts or burnt offerings.

The fruit of sin is death; reminding men of the gravity of sin.

“The animals which were offered in sacrifice were slain, because it is by being killed that they become useful to man, forasmuch as God gave them to man for food. Hence, too, they were burnt with fire: because it is by being cooked that they are made fit for human consumption. Moreover, the slaying of the animals signified the destruction of sins: and also that man deserved death on account of his sins; as though those animals were slain in man’s stead, in order to betoken the expiation of sins. Again, the slaying of these animals signified the slaying of Christ.” – St. Thomas Aquinas