21 What Does God Say of All These Commandments? Answer. He says thus (Exod. 20:5f): I the Lord, thy God, am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate Me, and showing mercy unto thousands of them that love Me and keep My commandments.

22 What does this mean? — Answer. God threatens to punish all that transgress these commandments. Therefore we should dread His wrath and not act contrary to these commandments. But He promises grace and every blessing to all that keep these commandments. Therefore we should also love and trust in Him, and gladly do [zealously and diligently order our whole life] according to His commandments.