Falls

Nature teaches more than she preaches. There are no sermons in stones. It is easier to get a spark out of a stone than a moral.

~ John Burroughs

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But you can get a morel out of the woods.  How about that, John Burroughs?!  Whatcha got to say now, sir?!  I realize a morel and a moral are not the same and wood and stone aren't the same.  My point is that you can get some stuff out of nature.  

I won't be waiting on an actual response since you died in 1921.