Two monks were arguing about a flag, and the Sixth Chan Patriarch [Hui Neng] overheard them.
First monk: “The flag is moving.”
Second monk: “The wind is moving.”
The Sixth Patriarch: “Not the wind, not the flag. Mind is moving.”
First monk: “The flag is moving.”
Second monk: “The wind is moving.”
The Sixth Patriarch: “Not the wind, not the flag. Mind is moving.”