3. When we use the name of God in cursing, swearing, conjuring, lying, or deceiving.
41. What is it to curse by the name of God?
It is to call down evil upon ourselves, our neighbor, or any other created thing, by the name of God.
42. What is it to swear by the name of God?
It is to bear witness to anything by the holy name of God.
43. Are we never permitted to swear?
Yes; when the proper authorities demand it in God's stead.
44. Why is it a great sin to commit perjury?
Because the perjurer shows open disregard for God and the salvation of his own soul, and frankly calls down the judgment of God upon himself.