Not the Wind, Not the Flag (GG29)

KOAN:

The wind was flapping a temple flag, and two students were having an argument about it. One said, “The flag is moving.” The other said, “The wind is moving.” They argued back and forth but could not reach the truth. The sixth ancestor said, “It is not the wind that moves. It is not the flag that moves. It is your mind that moves.”

—Gateless Gate Case 29