KNOWING FISH
One day Chuang Tzu and a friend were walking by a river.
“Look at the fish swimming about,†said Chuang Tzu, “They are really enjoying themselves.â€
“You are not a fish,†replied the friend, “So you can’t truly know that they are enjoying themselves.â€
“You are not me,†said Chuang Tzu. “So how do you know that I do not know that the fish are enjoying themselves?â€
…
(almost stolen from renegade Zen)