"Who has seen the wind?
Neither you nor I:
But when the trees bow down their heads
The wind is passing by"
well, no it was from another book,
so I don't remember as much as I thought I did!
corrected from info in a comment!
What made me think of this was a post here showing drawings of algorithms of the wind. It looks like some vast sea-creature to me. What does it look like to you?