Many of the laws that are discussed in these two chapters were really for the sake of setting Israel apart from the other nations so that they could understand how different of a people they truly were.  The Israelites were to be set apart for God, and they weren't to allow any kind of influence into their nation that might pull them away from their commitment to Him.  Additionally, the Israelites were to treat people in their nation the way they wished to be treated – all people had an elevated status before the Lord, and these laws are a reminder of that truth.  Additionally, they are a reminder to the people of Israel that they need redemption from the Lord, and the constant sacrifices taught that there are consequences for disobeying God's law.  I know I have written about both of these topics before, but the truths are woven throughout Scripture, and it's good to be reminded that these were not mentioned once only to be forgotten; they were meant to be remembered.