I learned a new way of seeing in Art class. For months I left class with a blinding headache, as my brain strived to "see" what I had never noticed before. This new way of "seeing" interfered with my viewing pleasure, as my overactive mind dissected people's faces in to shapes and shades. My world would never look the same again.
After I changed, it was harder for me to tolerate the newbies, who did not see what I saw. I could tell because their page bore no resemblance to what was in front of them. Some of them eventually "got it". Some never did.
Here's a "chair"