People go ga-ga over the brain and all it can do. I'm glad to
   have one honestly. But, dissatisfied over common analogies to
   the brain; telephone switchboard, Internet, computers,
   electricity, physics, I tried to find something more accurate.
   Then, when I discovered Cerebrospinal fluid and how it
   functions. There. That works better for me. Engine parts washer.
   It's funny because I went into the TOTAL OPPOSITE direction of
   what I normally do. I usually get all abstract. But to get very
   solid, functioning metaphor, I went into a direction I knew
   nothing about: cars, engines, etc. I realized I always talked
   thought engines, brain "running" (analogizing to an engine
   running) - slow, fast, etc. But I wondered just HOW LITERALLY I
   could take that analogy.

   Turns out, a lot closer to reality than I would've ever thought
   possible. [1]t Yeah; it's extremely unsettling. I made the
   animated .gif above just a few minutes ago. I searched for a
   video that showed an engine parts cleaner vibrating, with the
   cleaning fluids recirculating... and wanted something kinda
   pretty.

   But then in the middle of one video, I found THIS: the oil-water
   separation feature. The bubbling, primitive goo was _very_
   striking and almost painful to look at. I knew then it was
   perfect.[2]NPH_MRI_272_GILD [3]giphy

References

   Visible links
   1. https://www.facebook.com/oliver.springett.5?hc_location=ufi
   2. http://icopiedyou.com/wp-content/uploads/2015/08/NPH_MRI_272_GILD.gif
   3. http://icopiedyou.com/wp-content/uploads/2015/08/giphy.gif