a panda is swimming with a fish in pseudonumerals

"Memorizing this phantasmagoria taught me something about how the brain and memory work. The memory is like a strong magnet: pieces of iron stick easily (as pictures stick in the memory) but you will be continually frustrated if you try to stick pieces of aluminum to it (numbers don't stick in the memory). And if you want to be able to pull the pieces of iron off the magnet in a specific order, you need to tie strings from one piece of iron to the next, before you put the pieces on the magnet. Then you can pull off as long a string of iron pieces as you like!"