Read Exodus 20:1-21
Many Christians think there is an antithesis between the Law and grace, faith and the gospel [The Covenant of Grace]; but there isn't. The antithesis exists between the Law and using it for self-righteous motives in justification. The Law [The Ten Commandments] cannot justify us, but it can bring us to the one who does - the Lord Jesus Christ. The Law is an important part of the Covenant of Grace.