Leviticus, this priest's manual, explains how all the operations of the Levite Priesthood were to teach the people of God about holiness and sanctification in serving the Lord. The heart of the book is found in chapters 11-22, where the sanctification of God's people is explained. The tent of worship and the priests who officiated there were God's statement to the whole world that the chosen people of God were a holy people because their God was holy.