How do I Understand the Old Testament Laws

In todays' sermon, Tony De Kock teaches how the Old Testament laws show us our need for a Saviour, and how understanding the Old Testament helps us to know what the Father is like, and how He wants His children to live. “The days are coming,” declares the Lord,    “when I will make a new covenantwith the people of Israel    and with the people of Judah.32 It will not be like the covenant    I made with their ancestorswhen I took them by the hand    to lead them out of Egypt,because they broke my covenant,    though I was a husband to[d] them,[e]”declares the Lord.33 “This is the covenant I will make with the people of Israel    after that time,” declares the Lord.“I will put my law in their minds    and write it on their hearts.I will be their God,    and they will be my people." (Jeremiah 31: 31 - 33 NIV)