'I didn't know those equations before but it's the same as the one you showed me.'

'You're telling me you don't see a willow-tree in that photo.' And she perched forward with astonished curiosity.

I decided to spend a bit more time on it. As luck has it, I remembered that, as a young boy, there was a fashion of the time to have small portraits or postcards framed in rainbow-colored stained glass that showed new forms every time you looked at it from a different angle. As I was ...