Here’s the link to Article XVI: https://bookofconcord.org/augsburg-confession/of-civil-affairs/
This article was necessary because some of the radical reformers (particularly among the Anabaptists) were teaching that Christians must be entirely separate from the world: in their view, it was immoral for Christians to hold civil offices. On the basis of verses such as Matthew 5:37 and James 5:12, some taught that a Christian must never take an oath.
However, the Lutheran confessors recognized that civil governments have a God-given authority to restrain evil and punish evildoers. Let me explore a few examples.
While it is always a sin for a private citizen to take life, a lawfully-installed magistrate has the right and responsibility to sentence criminals to imprisonment (or, where there is a legal basis for it, even death for severe crimes). This authority goes back to Genesis 9:6. Likewise, a soldier who serves under lawful authority is not guilty of murder when fighting in a war (this presupposes that the authorities are engaged in just war– a topic too complex to cover here).
In daily life, it is inappropriate and unnecessary for Christians to take oaths. A simple “yes” or “no” will suffice. However, when required to take an oath by the proper authorities, we may do so with a clear conscience, provided we are sincere and honest (see Deuteronomy 6:13).
Furthermore, Christians may hold office in secular governments. In the Old Testament, we have examples of saints such as Joseph, Daniel, Ezra, Nehemiah, and Esther, who held high positions within the governments of pagan rulers. In Romans 16:23, Paul delivers greetings from Erastus, “the city’s director of public works” (NIV).
Romans 13 is crystal clear that Christians are to respect those in authority and submit to them as far as possible. The only exception is when the authorities command something that is contrary to God’s law. In such cases, Acts 5:29 applies.
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