I had to bring the grill over to my parents house for a play0ff game barbecue. As I rolled the grilled through the dog yard, I noticed that only one kind of, ahem, "mud" was being picked up in the wheel. And I thought - after the week of rain that we've had, why do the wheels ONLY pick up dog dirt, and not the nice clean dirt that cleans easily.
Then, it reminded me of sin and immorality. Why does that seem to stick so much easier than virtue?