Water

One can not reflect in streaming water. Only those who know internal peace can give it to others.

~ Lao Tzu

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So you can't reflect in streaming water. Given. But what about that fable about the dog and the bone. If the dog had passed over streaming water instead of still (reflective) water, he'd still have the bone, right? He wouldn't have foolishly dropped it to get the bone from the other (reflection) dog. But then he might have gone home and choked on it. Especially if it was a chicken bone. But who would give a dog chicken bones? That's not good. I think the person who did that needs to do some reflecting. In prison.