Luther's Little Instruction Book: The Small Catechism of Martin Luther

B. The Second Commandment

You must not misuse your God’s name.((Exodus 20:7))

Q. What does this mean?

A. We must fear and love God, so that we will not use His name to curse, swear, cast a spell, lie or deceive, but will use it to call upon Him, pray to Him, praise Him and thank Him in all times of trouble.