God gave the following laws to maintain holiness in the nation so He could continue to dwell among His people and bless them. This was particularly important since Israel would soon depart from Sinai to enter the Promised Land in which she would need to be holy to be victorious over her enemies. These were requirements for the whole nation, not just the priests.
"Between covenant promise and covenant possession lay a process of rigorous journey through hostile opposition of terrain and terror. Israel had to understand that occupation of the land could be achieved only through much travail, for Canaan, like creation itself, was under alien dominion and it had to be wrested away by force, by the strong arm of Yahweh, who would fight on behalf of His people."34