It's the line we walk in every situation we encounter.
It's the guy on the park bench staring at your five year old daughter and smiling. You watch her play and you watch him. Just an old man who sees innocence and can't stop looking, or that lowest of humans against whom every decent adult must defend every child?
It's the guy standing on the corner of your street, ten feet from your house, with his hands in his pockets after midnight. You keep tabs on him out the corner of your eye as you unlock your front door. A young man out for a late stroll, or the lookout while his friends lurk in the alleyway two terraces down, waiting for the right opportunity to assault and rob?
We hope for the best, but prepare for the worst, working to leave the world a better place than we found it, trying not to run out of time.