All humans should strive to live rightly.
Sounds good to me. I even attempt to do so. But "living rightly" has very little to do with whether I say "shit!!!" when I get one of these Texas grass burs stuck in my finger when I'm pulling weeds. And I do "excersise self-control" - I stifle it when I am able when small children are around.
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An interesting thing I heard years ago that I've never really confirmed: the Bad Cusswords in England and the US tend to be body functions, body parts, and, I guess, body wastes. The Bad Cusswords in Southern Europe and Latin America tend to be "blasphemies" - goddammit and the like.
Anybody have anecdotes to back that up or refute it?