No man could be equipped for the presidency if he has never been tempted by one of the seven cardinal sins.
In the old days... it was a basic, cardinal fact that producers didn't have opinions. When I was producing natural history programmes, I didn't use them as vehicles for my own opinion. They were factual programmes.
If any sort of error is inexcusable, it's an incorrect phone number. One of the cardinal rules of copy editing is that every phone number published must be checked.
I committed a cardinal sin as a kid. I never spoke, and my mother thought there was something seriously wrong with me. A silent child is regarded as a problem in Ireland, and I just read all the time.