I find it very offensive hearing others use the Lord’s name in vain during general conversations, such as while at work, etc. As a result, I am very strict with my own speech to avoid, even accidentally, using the Lord’s name in a disrespectful way.
Today I ran into a friend at the grocery store. He told me that a mutual friend of ours, whose father died only days before, is now suffering with the accidental death of his 22 year old daughter. Out of sadness and shock, I quietly said, “Oh my God.” Immediately after saying it, I felt like I had used the Lord’s name in vain. What is your opinion of this? Am I being overly scrupulous? Was it a mortal sin?