Useful to instruct Christians

…filled with the knowledge of his will in all spiritual wisdom and understanding, so as to walk in a manner worthy of the Lord, fully pleasing to him, bearing fruit in every good work and increasing in the knowledge of God. (Colossians 1:9–10

 As Christians, we understand that Scripture teaches that we are to live in alignment with God’s Word. The clarion call expressed here is that we apply our knowledge of God’s wisdom and understanding to our lives and bear fruit, further our knowledge of God, and live a worthy life which pleases Him.
 Understanding what God teaches through His Word and applying that teaching is what a life that pleases God is all about. But how do we apply the teachings of the Bible to our daily lives? How do we know if our choices align with the teachings of Scripture?
 While Christians are not required to live according to the Old Testament law, the Ten Commandments provide a framework for addressing moral and ethical standards for Christians. Even though Jesus’ life and death fulfilled the Law of the Old Testament, Paul considered it to be useful to instruct Christians.
 While the New Testament teaches that the Mosaic Law has been fulfilled and Christians are not bound to follow the Law, it also teaches that the principles found within the Ten Commandments are useful as teaching tools to show what kind of conduct is pleasing and displeasing to God. —Peter Amsterdam [1]

The ten commandments and the sermon on the mount contain my religion. —John Adams

[1] Anchor The Old and New Covenants