It is important to study the Old Testament to understand how God unfolds the revelation of Christ in the New Testament. The Lord's Passover and the exodus out of Egypt's bondage point to Christ's delivering sacrifice. Just as the children of Israel had to apply the blood of the lamb to the door to be spared from death, we must apply the shed blood of Christ to our hearts. The whole event is a template for us as we act in faith today and receive His deliverance from the bondage of sin and death.