151 Q: Since Christ has abolished the law, why are we bound to the ten commandments?
A: Christ has done away with the civil and ceremonial laws of Moses in such a way that no one is obligated to keep them anymore; moreover, it is not at all proper to reintroduce in the church the ceremonies which pointed to the future revelation of the Christ. And, for those who believe in him, Christ has also done away with the ten commandments in such a way that they no longer condemn them. But now that the grace of God in Christ is so much clearer, we owe all the more obedience to him.
152 Q: How many parts are there in the decalogue?
A: There are two tables. The first consists of four, and the second of six commandments.
153 Q: What does the first table teach?
A: How we ought to be and act in relation to God.
154 Q: What does the second table teach?
A: How we ought to be and act in relation to others.
—Zacharias Ursinus, Large Catechism in Introduction to the Heidelberg Catechism, ed. Lyle Bierma et al.